i know this really doesnt matter but i bought a shadow chassis racing kart with a briggs and stratton raptor 5 horse for 300 on IA. the kart was for sale for like a half a year before i saw it and immediatley bought it. a set of bridgestone tires later, definately worth it. keep your hopes up but every racing chassis ive seen since has been at least 400 for a bare chassis.