I agree, Surf. The location of the car is important. I would be much more accepting of the frame if the car was from Arizona, California, or New Mexico but as a general rule, unless the seller specifically said he installed a new frame, I would assume that ANY S1 is going to need one. That would apply to a slightly lesser degree to S2s and TCs unless there are pictures that indicate otherwise. If the frame hadn't been changed, I would still be wary.