Well, contacted the seller on the 2010 ZR1 today. Turns out the "mileage" was reported incorrectly and should have been 21,302 not 11,302 as shown in the ad. The person I spoke with was either not very knowledgeable about the car or did not want to answer some of my questions. So I think I will take a pass on this one and keep looking. The "mileage" was too high for me anyway.