wow, the guy is most likely some foreigner who moved here recently, and the games he sells are most likely cheap imports from china or india (they sell games ridiculously cheap there)
still it sucks to have a bad sale, i once sold a $5 gift card for 11 cents and it ended up costing me like $7.
checking some of the stuff he buys, it looks like he's buying stuff and reselling it and considering the price and location of some of the stuff, they could be bootlegs.