s600's are $130,000.. the only mod done to the car is a RennTECH ECU, which at most could of costed him 2-3g's. I've talked with the guy on the corvette and BMW forums before. He also owns a Viper venom and his wife owns a RT/10.
http://kyle.krillusions.com
Rio Red V6 ATX Cougar
Roush Body Kit + Springs, 18" Axis Se7ens w/ Toyo FZ4 Rubber, Dual Magnaflow exhaust, AEM Intake, Tint, other goodies.