Still talking about this? Damn... Well I'm using an paid marketplace extension and it has classifieds option and my users can sell their stuff and I got a % of their sales, its a very complete market place and its always getting better since the dev always do improvements time to time. But its paid... but I asked to some developers and all asked for values above 2000$, I paid below 100$! In less then 1 month that value was already paid with the % I got from my users. People that doesnt pay for developers for extensions, dont value their own time, and therefor those people dont even deserve free extensions imo. But good luck with your ideas! As some told, there are MANY ways to have a classified system, as using bridge plugins with wordpress or even with other kind of shops as prestashop, there are some limitations in all of them, so choose wisely, in any case you'll need to ask to any of the devs to improve it with the things you think it doest have.