He's somewhat "revolutionizing" trading/auction house by using social network and that's fb. But i don't think this is appropriate coz we have already a trading/selling forum.
But but then again mr zozo if you want to pursue that then I suggest to use a page, open/close it depends on you. Take a look at this group ( this is a dota2 trading group where people trade items and also like a forum that always have the "bumps", "PMs", have some screenies, etc )
https://www.facebook.com/groups/289648664487290/
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