Etsy has so many sellers that search results can be overwhelming, so we've put together our own list of shops with great clothing/accessories and glowing customer reviews. In the interest of keeping this curated to SFG's taste, we do not accept submissions to this list.

New stores are added all the time! Check the bottom of each category for the most recent additions.

Clothing/Costumes:

• SilverLeafCostumes - Stunning handmade costumes for men and women, including steampunk-inspired superhero & villain costumes. Even Guillermo del Toro shops here! US based shop, offers international shipping.
• RomanticThreads - Specializing in vintage reproduction, victorian, medieval and renaissance gowns & wedding dresses. Every dress is our dream dress, especially the replicas from Interview with the Vampire, Dracula, & Gothic Sleeping Beauty. US based shop, offers international shipping.
• DressArtMystery - Beautiful Victorian & Steampunk costumes for women (and a few for men) with lots of thoughtful details and embellishments. Shop based in Ukraine, offers international shipping.
• Auralynne - Lovely Neo-Victorian women's costumes and gowns dripping in lace and flounce, with over 1,000 stellar reviews from very happy customers. US based shop, offers international shipping.
• Romany Rapture - Men's and women's Steampunk separates, as well as complete costumes, made from luscious fabrics. US based shop, offers international shipping.
• DASOWL/dashandbag - Colorful and unique men's and women's Steampunk clothing made from gorgeous silk brocades and tapestry cloth. We are in love with these colorful fabrics! US based shop, offers international shipping.
• KMKDesigns - Beautiful Steampunk and Neo-Victorian clothing for men and women (including plus sizes). They specialize in wedding apparel and custom work, but also have some lovely casual pieces. US based shop, offers international shipping.
• MeschantesCorsetry - Specializing in beautiful ready to wear & custom corsetry, this shop's corsets have been seen in Playboy, Vogue, & People magazine. Selection includes vegan leather and suede corsets, & plus sizes. US based shop, offers international shipping.
• FiorentinaCostuming - Historical costuming shop for women. Lovely Victorian corsets, skirts, gowns, and other pieces, including a Victorian bathing suit. Shop based in Ukraine, offers international shipping.
• TalismanaDesigns - This 4 year old shop has already amassed over 15,000 sales! You'll see why when you check out their women's clothing separates (skirts, ruffle shorts, capri length bloomers, fitted jackets, etc.) They're also in our 'Accessories' category below for their cool utility belt bags. US based shop, offers international shipping.
• FanPlusFriend - Focusing on Gothic, Steampunk, Lolita, & Classic clothing, this is the etsy shop run by the larger store, FanPlusFriend.com. Lots of great steampunk separates that can be integrated into a modern wardrobe, our favorites are the men & women's jackets, the neo-victorian blouses, and the steel birdcage skirts. Shop based in China, offers international shipping.
• DecadentDesignz - Gorgeous, gothic separates for women. Think dark, sexy, and modern. We're obsessed with the neck corsets/collars/chokers (in everything from feathers to lace), the lace blouses, and the PVC pieces (like the Victorian bolero jacket and hobble skirt). Shop based in Canada, offers international shipping.
• TheTutuStoreUK - Bright, beautiful tutus & bustle skirts made of tulle, feathers and lace! Opulent peacock and ostrich feathers in vivid colors make these pieces look both luxurious and dramatic. Perfect for Steampunk showgirls, burlesque dancers, saloon girls, etc. US based shop, offers international shipping.

Accessories:

• BruteForceStudios - Some of the most unique leather corsets, bracers, bras, & other accessories, we've ever seen. Makers of the Superior Replacement Arm worn by Nathan Fillion on Castle (buy your own here). US based shop, offers international shipping.
• Versalla - Leather holsters for weapons, parasols, folding fans, teacup & saucer, potion bottles, scrolls, pocket watches, & tankards. Leather pouches, bracers, and skirt hikes. Skilled leatherwork at affordable prices. US based shop, offers international shipping.
• SteampunkDesign - They may not be cheap, but if you're looking for high end goggles and monocles that are wearable works of art (think brass telescoping lenses and working iris aperture shutters), this is the shop for you. US based shop, offers international shipping.
• BrazenDevice - Here you'll find handmade leather & brass goggles, unique leather Steampunk helmets, and cool mechanical insects to display. US based shop, offers international shipping.
• SteampunkandSCA - This Steampunk and SCA artisan makes beautiful leather & brass bracers (aka vambrace), goggles, helmets, masks and gas masks. US based shop, offers international shipping. 
• SteampunkMasks - This expert leather-maker creates amazing Steampunk and Dieselpunk leather top hats, plague doctor masks, aviator helmets, respirator masks, goggles, armor, and more. Shop based in Romania, offers international shipping.
• HarlotsandAngels - This experienced seamstress sells downloadable PDFs of her patterns so you can print and DIY at home, as well as paper patterns that can be shipped. She also sells some costume pieces, leather accessories and LED illuminated meter and gauge boxes than can be hung from a corset or belt. UK based shop, offers international shipping.
• AtomFashion - Techno-industrial, post-apocalypse, Cyberpunk, and Steampunk leather accessories. Leather bracers, watches, goggles, harnesses, bracelets, hip bags, messenger bags, notebooks, backpacks, utility belts, and more. Shop based in Russia, offers international shipping.
• MinistryofMasks - Unbelievably awesome and original collector-quality latex masks! Check out the Steampunk diving helmet/mask, Dark Knight cowl, Steampunk robot, plague doctor masks, post-apocalyptic gas masks and the crazy Cthulhu masks! UK based shop, offers international shipping.
• Mann&Co - Exquisitely made Steampunk/Dieselpunk leather goods with a militarized style, made by a talented husband & wife design team. Even the stitching is beautiful! Leather masks, goggles, bowler and aviator hats, bracers, amazing gauntlet, and more. Shop based in Russia, offers international shipping.
• FantasyFuzion - Awesome leather top hats with hat bands containing trinkets like glass vials and little satchels (you have to see them to understand).  Leather tricorn airship hats, satchels, holsters, eye patches, and more. Shop based in Canada, offers international shipping.
• Thousandformed - Unique, high-end Steampunk goggles made from leather, brass and glass. Features like overhead straps and strange brass fixtures make each piece an original. Their leather and brass masks are just as cool and weird. Shop based in Russia, offers international shipping.
• ApocalypseHardware - Huge leather and machined metal Steampunk/Dieselpunk goggles. The cool leather wrist cuffs with machined aluminum hinges have an industrial/goth feel. They also have Dieselpunk plague doctor and gas masks. US based shop, offers international shipping.
• TheBlondeSwan - This hat boutique sells a variety of interesting Steampunk hats and goggles. Bowlers, top hats, engineer's caps, unique pilot caps (these were our fave), mini toppers, riding hats, and more. US based shop, offers international shipping. 
• ILeatherCraft - Beautiful handcrafted, hand-stitched leather masks, bracers, cuffs, armor, and more. All pieces are incredibly detailed and creative. Shop based in Canada, offers international shipping. 
• MetamorphQC - Head turning dark fashion with many gothic and Victorian inspired pieces made with feathers, leather, and lace. Edgy and fashionable collars, headpieces, cool shoulder armor and accessories. Shop based in Denmark, offers international shipping.
• OohLaLaBoudoir - Awesome women's top hats and fascinators in bright patterns with feathers and fun embellishments. We love the tricorn pirate hats with miniature ships. UK based shop, offers international shipping.
• TimmyHog - We discovered this leather maker via this photo shoot and have been obsessed ever since. Their gauntlets and bracers are the standout (some even light up), but we also love their cuffs, belt bags and spats. Slovenia based shop, offers international shipping.
• ChikiBird - We love all the charming embellishments on these whimsical mini top hats and fascinators. From feathers, flowers, and shells, to miniature ships, clocks, and teacups--these toppers are a conversation starter for sure! US based shop, offers international shipping.
• AtticRaiders - Awesome arm-less Victorian style monocles & sunglasses--they stay perched on your face via a comfortable pinch-on nose piece! Our other favorites include leather holsters & thigh bags, antique binoculars & opera glasses, and compasses & pocket watches with leather fobs or cuffs. US based shop, offers international shipping. 
• SAnomalous - These lightweight latex monocles are so creative, it's no surprise they were made by a creature designer/FX makeup artist. They can be attached via leather strap, metal chain, or you can glue them directly to your face! US based shop, offers international shipping.
• MyFunkyCamelot - Great fabric and leather accessories. Standouts include the leather skirt hikes, bandoliers, and suspenders. We also like the Kraken bag, leather & lace collar and cuffs, and double belts. US based shop, offers international shipping.
• TalismanaDesigns - There's a reason this 4 year old shop has already amassed over 15,000 sales! Their utility belt bags are the most creative we've seen (our favorites are the wings and bustle bag). Their women's clothing separates are so awesome, we've added them to the 'clothing' category, too. US based shop, offers international shipping.
• BlackUnicornShop - Awesome fantasy headpieces! Each one belongs in a fashion editorial. Hats, headdresses and crowns with giant feathered ravens, birdcages, ships, skulls, octopus, and so much more! Shop based in Germany, offers international shipping.

Jewelry:

• DesignsByFriston - Unique and beautiful Steampunk jewelry, from brooches/pins, necklaces and earrings, to headbands and cuff links. Well-crafted pieces from an experienced jewelry designer with almost 3000 etsy sales. US based shop, offers international shipping. 
• BronzeSmith - Professional metal artist specializing in bronze and copper masks, jewelry and other adornments. We love the bronze octopus tentacle hair sticks, delicate bronze sculpted monocles and stunning octopus necklace. This seller has designed for Dior and Cirque Du Soleil! US based shop, offers international shipping.
• CatherinetteRings - Cool steampunk jewelry made from metal wire, gemstones, vintage clock parts and other unusual components. Glowing pendants, Steampunk spiders, gothic cameos & more. Shop based in Canada, offers international shipping.
• TwistedSisterArts - Stunning, unique, woven-wire jewelry pieces. Standouts include the ornate headpieces, intricate statement necklaces, whimsical pins & pendants, and anything with a hand-painted glass eye. US based shop, offers international shipping.
• PeteAndVeronicas - Makers of Zippology (Steampunk zipper jewelry) these pieces are whimsical and fun. Bracelets, earrings, necklaces/chokers & more. We love the quirky insect brooches, especially the butterfly and cicada. US based shop, offers international shipping. 
• FernStreetDesigns - This artist refers to her work as an "assemblage" because each piece is a collage of found treasures and vintage parts. We love the jeweled Queen Bee crown and cuff, the chunky bib necklaces, knuckle rings and brooches. US based shop, offers international shipping. 
• EdmDesigns - With over 14,000 sales, this is one of the top Steampunk jewelry sellers on Etsy. Their cuff links, rings, necklaces, earrings (& more) have been worn by many celebrities and featured in a ton of magazines. Many pieces feature fine watch parts from the 1800s to the 1940s. US based shop, offers international shipping. 
• DedovaShop - Ring, earrings, pendants, cuff links, and more. Many pieces are made using vintage watch parts with animal and insect themes. They also sell jewelry supplies. Shop based in Ukraine, offers international shipping.
• AllNaturalArts - Famous Steampunk artist Sue Beatrice is known for her tiny, detailed animal and insect sculptures made from watch parts. Sue casts some of these sculptures in metal and turns them into beautiful pendants which she sells in this Etsy shop. US based shop, offers international shipping. 
• AccessoryAlchemy - Steampunk jewelry with an antique feel. Lots of beautiful Victorian jewelry, like the filigree drop earrings and wrap necklaces. We also love the cocktail rings, hot balloon necklaces, and cool cuff links. US based shop, offers international shipping. 
• SteampunkNation - These pieces are more delicate and feminine, and many feature vintage watch parts. Earrings, necklaces, cuff links, lockets, cuff bracelets, and more. US based shop, offers international shipping. 
• MysticThreadDesigns - Beautiful gothic and Victorian jewelry. We love the opulent rings, embellished velvet chokers, and circlet headpieces. They also sell cool accessories like feather shrugs & shoulder epaulets, neck corsets, and lace crowns. Shop based in Cyprus, offers international shipping.

DIY Supplies:

• GreenStuffWorld - All the supplies you need for making Steampunk jewelry and accessories. Tons of metal beads/embellishments: cogs & gears, gothic keys, watch parts, animal & insect beads, etc. Colored goggle lenses, loupe lenses, buttons, and so much more.
• MagicPug - Vintage style digital collage artwork you can download and print at home to use in crafts, jewelry, pinbacks, etc. These look like beautiful aged Victorian ephemera! Victorian magazine ads, fashionable women, compasses, watch dials, hot air balloons, and so much more. Instant digital downloads, no shipping necessary.
• MobyCatGraphics - Bright and colorful high quality digital collage sheets for jewelry making, crafting, scrapbooking, etc. Modern and artistic work! Steampunk cats & butterflies, maritime portholes, steam gauges, vintage women, Victorian dogs in clothes, and much more. Instant digital downloads, no shipping necessary.
• CuriosityShopper - This shop sells "old curiosities, amazing re-discoveries, upcycled novelties, and whimsical oddities." You'll find all kinds of Steampunky knickknacks, parts, and treasures perfect for making any prop your Steampunk character needs. US based shop, offers international shipping.  
• HarlotsandAngels - This experienced seamstress sells downloadable PDFs of her patterns so you can download instantly, print, & DIY at home, as well as paper patterns that can be shipped. She's also listed in our 'Accessories' section for her cool costume pieces, leather accessories and LED boxes. UK based shop, offers international shipping.
• CaityAshBadashery - This cleverly named shop sells vintage found objects and curiosities for mixed media, altered art, assemblage, steampunk, & jewelry making. Antique watch parts, keys, keyholes, pulleys, brass gears, clock hands, & more. US based shop, offers international shipping.  
• TheTwistedEye - The artist behind the amazing jewelry shop TwistedSisterArts has made some of her most popular jewelry supplies available for DIY artists everywhere. Here you'll find her metal stampings, labradorite stones, metal crown banding, and incredible hand-painted glass eyes. US based shop, offers international shipping. 

Weapons:

• SteampunkGearWorks - Cool hand painted guns, gizmos and other weaponry. While you're there, check out their little lanterns. US based shop, offers international shipping.  
• OwlVsOctopus - This store specializes in custom leather steampunk gear. Lots of cool leather holsters and bracers here, but our favorites are the weapons, like the steampunk crossbow pistol & quiver bracer, and the throwing knives (with holsters that range from bracers to harnesses to gaiters). US based shop, offers international shipping.