Because it looks like he just bought a bunch of the shirts with the sole intention of reselling them for more than twice what he paid. I'm not above selling things for more than I paid (hell, that's how I generate most of my income), but at least take that elsewhere. There are quite a few people in this thread and the sale thread who expressed genuine interest in owning some of these shirts, so it's kind of a bad look that a member here bought quite a few of these same shirts with the sole intention of turning a profit.
But whatever. Anyone familiar with GV knows you can score a lot of the non-print shirts for less than what he's asking if you're patient and pounce on the sales.