Frontman guitars with a new sale in their "Countdown to Black Friday." The savings are ridiculous. If you don't have a Wii Guitar Hero game and don't mind forgoing the World Tour full band experience (or putting it off while building up a collection of guitars), you could do a lot worse.
If you purchase a copy of Guitar Hero III or Guitar Hero: Aerosmith ($35 each) and add two Frontman guitars ($20 each) to your cart, $20 will be knocked off your order. So you end up with a game and two guitars for just a little more than the normal cost of a retail game.