Swap.com

From the perfect night-out dress to kids' clothes to baby slings, this comprehensive shop has everything you need at low prices. All items are shipped in one business day and you can purchase items by swapping with your own.
Closet Rich

Started by L.A.-based stylist Elizabeth Kott, the website offers a collection of "pre-loved" pieces that come from the closets of private clients. From designer duds to vintage finds, you'll come across a fabulous item as you scroll through its cool, minimalist feed.
Image via @shopclosetrich
Moxie Jean

Founded by a mom who was tired of throwing out her kids' outgrown clothes, Moxie Jean is an online consignment shop solely dedicated to kids' clothes. Take the style quiz by selecting your kid's gender and let the stylists choose their top picks for you and your family. Perfect for back-to-school shopping!
Image via @moxiejeankids
Bib + Tuck

The go-to consignment store for cool girls everywhere, Bib + Tuck is an online destination for those who love the latest trends and products. From Helmut Lang oxfords to a Marni floral skirt, the heavily curated site offers the best consignment items in contemporary fashion, which you can buy using your earned dollars from selling.
Image via @bibandtuck
Little Sprouts Resale

Created for busy moms this site makes it easy to shop for your kids from high-end, luxury and organic brands at discounted prices. Hand-selected by the team, its inventory promises to deliver quality pieces to families.
Shop Hers

If you're looking to invest in some serious designer goods head over to ShopHers for a slew of luxury options. Although some are still way over our heads ($11,000 Birkin bag anyone?), you can still stumble upon discounted designer finds.
Image via @followshophers
My Kid's Threads

Claimed to have the highest payout, My Kid's Threads is a children's designer consignment site that offers clothes and accessories from GapKids to Burberry.
Image via @mykidsthreadsllc
The Real Real

Another luxury consignment shop to check out, The Real Real offers killer authenticated designer accessories and shoppable editorial content.
Image via @therealreal
SnobSwap

This online retailer only sells the best of the best from selected consignment boutiques and private collections with up to 90 percent off on your favorite designers like Chanel, Christian Louboutin and Prada.
Image via @snobswap
ThredUP

One of the biggest online consignment stores, ThredUP offers up to 90 percent off in women's and kids' clothing and accessories. It's also super easy to sell here. Just pack up all your gently used items and ThredUP will pick it up, cover shipping and pay you when they're sold.
Image via @thredup