I came out of lurking to post this.
FUCK NO! DON'T DO IT!
Best Buy has got to be the worst place to work retail, and that's saying something. Fuck, go to Wal-Mart instead. The discount can be nice, but only on certain items, mainly car stereo and home stereo equipment. The discount on games isn't all that great, generally a $50 game will cost you around $42-$44.
If you do decide to work there, prepare for monthly (or twice monthly) 7 AM brainwashing sessions on Saturday mornings, where you get to watch corporate DVDs and go over sales strategies and the like, as if your shit job working retail was somehow difficult or important. Of all the stupid bullshit you have to put up with at Best Buy, those goddamn meetings are among the most annoying, because they're so pointless. Conning a 70 year old grandma into buying a $2000 PC package so she can e-mail her grandkids at least makes sense from a profit standpoint, but the meetings accomplish nothing.
If you want an image of the work environment, rent Office Space. Best Buy is the retail version of Initech, your boss is the manager of Chochkies, and the ideal Best Buy employee is the annoying waiter dude. Don't do it, for the love of God, don't do it.