As this project appears to be fairly unknown in the fediverse still, I’d like to use this opportunity to advertise Flohmarkt. This Fediverse equivalent of Facebook Marketplace already has some instances up and running - see here: https://codeberg.org/flohmarkt/flohmarkt/wiki/flohmarkt-instances
I think an English localization as ‘Flowmarkt’ or ‘Flowmarket’ might be more catchy in English-speaking countries, since the intended pronunciation for ‘Flohmarkt’ isn’t clear at a first glance.