I found out about OfferUp from a comment on !frugal@lemmy.world to post https://lemmy.world/post/1953789, by commenter @karpintero@lemmy.world .

The OfferUp site doesn't let me look around as it's geoblocked, and VPN didn't seem to help. So I went off the Wikipedia description and Googling:

• Competitor to eBay and CraigsList.
• It seems to be around in some major cities, and shipping is available for inter-urban or less urban locations.
• It's both for buying in straight-up transactions as well as bidding (a'la eBay).
• Most item categories are free to list items in, but it costs to put up more than a limited number of listings a month in certain categories.
• They have fees for the sales based on the transaction value
• They have some form of moderation
• They have some user based moderation based on ratings
• They tie user accounts to actual persons
• They don't handle food transactions (?)

Based on these points I would be inclined to not considering it as a thrifting resource to add to the stickied list, on the other hand I've listed an auctioning site in Sweden as a thrifting resource, and might as well include eBay as well.

Your thoughts?