People who's only posts are selling stuff, selling overpriced US stuff on eBay especially, aren't very popular here. There aren't any rules against it, but you're going to have to get used to this kind of thing because most of this feel this way.
When someone's first post is selling an overpriced game, many of us get the impression that your only place in this hobby of ours is to make things more expensive for the rest of us.