I just found 360 version of Guitar Hero: World Tour, with wireless guitar for $22.48 at the Target on Sidney Marcus. As far as I could tell, I got the only one, but it might be worth checking out this/other Targets =)
The Circuit City just north of Atlanta (Pleasant Hill rd.) had the Donkey Konga 2 w/ Bongos and Jungle Beat w/Bongos for $19.99 each, though they were marked $49.99 and $54.99.
Thanks for the heads up OP.