It depends on the store. Sixth Avenue Electronics, P C Richards, and other stores like that definitely allow bargaining on price. In fact, I'd not recommend buying from them until after you've done your research and know the going price, or else you'll get scalped!

Meanwhile, places like Radio Shack, Big K-Mart, and similar places do not negotiate.

When in doubt, ask, "Are these prices fixed, or is there room for negotiation here?"

If negotiation is permitted, they'll probably retort with something like, "What did you have in mind?" Make sure you have an offer in mind before you ask if you can negotiate, or else you'll fumble around trying to think of one on the spot.

Jeff