I haven't but it could work. I think you would be able to sell things only if you have been on nostr for a long time and your profile is trustworthy. I would probably video cam or at least mic talk with someone.

I wouldn't buy anything from most people in the marketplace and most of them have empty profiles but there is quite a bit of profiles i would buy from.

The biggest issue is shipping costs and distance. It's not worth selling anything for me at the moment when people can get most things on Amazon much cheaper