Hi, sorry for the stupid question, but I do not see where to leave buyer feedback for some sales that I made? Is this possible? Thanks!

You can't leave feedback for buyers.

OK thanks. Does anyone else think it would be a good idea to leave feedback for buyers?

Sebi wants the marketplace to be heavily-geared towards catering to buyers. Having them receive negative feedback on their purchases would probably be in tension with this vision. Not sure if I agree with that, but it definitely is this way for a reason.