xbox slime 250g and connect plus games (swap for Quad) ?

i have a xbox slim 250g with connect plus games. all item is as new as! unwanted xmas present for my kid! he rather play ps3 instead! item itself its hasnt been on line and its only been played couple of times! it will come with original box! and it still have its 6 month warranty left! if i can find the recite! which i should! wanting to swap for a quad around 100cc! must be in good running order as its for my son!