1 On average, the Xbox 360 cost will be anywhere from $199 to as much as $400 depending on the model that is purchased. 2  Listed below are the models that are available as well as what they are going to cost. 3  The basic Xbox 360 will cost about $200.4  This console has a fairly small memory – only 4 GB. The basic Xbox 360 will cost about $200. 2  This console has a fairly small memory – only 4 GB. 3  A 250GB Xbox 360 will cost about $300. 4  A 4GB Xbox 360 with Kinect, a motion sensor system which makes gameplay more realistic, will cost about $300.