It really doesn't matter... If the dude wants to waste his time in line throughout the entire Con (more so than anyone else anyways)... let him. Who cares?
I know I went through about an hour of standing around just to get my measly single Cobra Commander figure, and that was enough for me. Conventions suck and are awesome at the same time, the trick is making it more awesome than sucky.... standing in line ADDS to the suck factor.... so I feel that anyone who decides to buy a whole mess of crap and sell it later is paying their dues in the lines...