I tried it out hoping it would overcome most of the clearnet requirements that lnpay/withdrawal has. But it didn't. Things broke down when going between mints using tor and clearnet. All these bolt on products really need their backend to be on tor or if reliability is an issue then it's own network similar to what the Samourai wallet guys do with Soroban or what #monero does.
Item and all chats should be archived, somehow.
People are going to be talking to strangers and those should not interfere with the usual list of people in their DMs.
But marking as SOLD is also important to track the performance of the marketplace.