This is after 12 hours after paying what the seller wanted and he response was:

Direct message from: ring deals
Chat message for Mmats 3000. 05 Old School Beast this is hooked up in my car and shouldn't have even been active that amp is worth over a grand i not going to sell it for pennys and to be honest I don't care if the site puts 0 stars the amount I would have got after fees is not worth me selling it for that amp is rare and I'm not selling it for pennys sorry but mot. Sorry thank you for your interest tho

Only to have reraise and relist the item.

This is on the site https://www.mercari.com/favorites/?tab=recent

They seem to be operations far removed from serviceand I would say they are scammers