Amazon
3. Craigslist
4. Facebook Marketplace
5. Etsy
6. Poshmark
7. Mercari
8. Letgo
9. OfferUp
10. Swappa
11. Depop
12. ThredUp
13. Ruby Lane
14. Chairish
15. Bonanza
16. Vinted
17. Tradesy
18. Grailed
19. StockX
20. Reverb
21. The RealReal
22. Threadflip
23. Material World
24. Wanelo
25. Gumtree
26. VarageSale
27. Close5
28. BookScouter
29. Zeek
30. 5miles
31. Carousell
32. Tophatter
33. Rakuten
34. Listia
35. Offerit
36. Facebook Buy and Sell Groups
37. Nextdoor
38. Letgo
39. Shpock
40. Instagram Shops