Totally forgot about that last part... man, never buy a MB or Graphics Card from Fry's if there's a sticker on it... avoid like the plague, and never buy a laptop/desktop there either... head to BB for that.
There was a time where motherboards were shipping with terrible BIOS, and you could save a bunch of money by buying one of those that was returned and flashing it first thing.For things without a good chance of easy fixes, though, I would probably not buy a previously returned one.
Of course, now they don't really have that kind of merchandise, so this knowledge is pretty much worthless :P