There is nostr:npub1mftv2j67vayavkks8rqev3u8jjhefe86tf80msstfxvpunk9vmps6prkl3 option. It find your contacts and contacts of your contacts which sells bitcoin for p2p trade. With people who you know or you know somebody who know them so you abylity toccheck their trustworthines.

Problem is it's need access to your contacts (just phone numbers for discovery), but it is transparent and FOSS, but still, hash of telephone numbers of you and your contact will be send to server under controll of Vexl (for use it needs to be done) and also don’t know how much is it used in your area.