I agree in that I would have at least asked if they were actually $15 and bought them if they were. It's no different from a rescue. Although I doubt any store owner got albino balls cheap enough to sell for 15 bucks... Beyond that it's up to the person as to what you do with them. In my case, if they were a pair, I'd keep em.
The fact that people are saying they've seen stores much worse than this seriously saddens me.
It is a bummer. Here is a 'local' shop, using snakes as substrate for other snakes.