Actually, people don't buy your items if they aren't the lowest they can find, which is natural, so I'd say that marketing that way is terrible because there is no way to gain more of a profit unless you buy all other items from the shops that have the items, and sell yours high. (Tedious, isn't it?)
I'd work on making some kind of art (Mostly textures) and try to get some $$$ out of that.