For posterity's sake, I did end up buying some open-box headphones from these guys. Both the seller and their product are "sound" ;) and I wouldn't worry about the build quality of the cans. They didn't inspire confidence at first, but they won me over quickly.

Hey, did you end up buying the PSB's from Spearit Sound? If so, did everything turn out okay? I'm really thinking about buying from them and would love to hear about your experiences...

Hi Head-Fi, glad I found you all! I'm a soon-to-be college grad looking to glean wisdom from those who know more than me.