ReadWriteShop is an occasional series about the intersection of technology and commerce.

Today's women's fashion "re-commerce" websites are certainly no bargain bins. Sites like Threadflip, Poshmark, Bib + Tuck, LikeTwice, and Thredup are re-selling used—sorry, make that "pre-worn"—haute couture, and even pieces from upscale outlets such as J. Crew, like nobody's business. 

So if you were afraid you'd be browsing past Forever 21 and TJ Maxx rejects at these sites, think again. Turns out that women are busily recycling couture gloriousness, making it available to others at much cheaper prices—and turning those Chanel and Saint Laurent dreams into reality for buyers.

Check out the best-selling brands at these five leading women's fashion re-commerce sites: