The P2P marketplace OPENBAZAAR was backed by powerhouse VCs Andreessen Horowitz and Union Square Ventures. Yet it failed.

https://www.coindesk.com/business/2021/07/15/openbazaar-co-founder-explains-why-web-3s-answer-to-ebay-folded-its-tents/

One of the main reasons in my own opinion: no categories-tree, no good search function. Bad UX, in short.