WTT: 20 gig Xbox 360

I have a Xbox 360 with the 20 gig hard drive. I have only owned it since last november. It comes with two wireless controllers (a white one and a black one) as well as the rechargeable batteries and cord to charge them off the xbox. The games I have for it are: Grand theft Auto, Need for speed pro street, madden 08, turok, guitar hero world tour (controller comes with it also), some wrestling game, need for speed underground, halo 3 and i think thats it. looking to trade for a 1000watts rms x 1ohm or more amp.