RangerRhett:
Whatever boxster you find to buy, take it to a shop that has the new laser four wheel balancing machines that kick out color printouts for you. This will instantly show you if the car has frame or subframe damage. You'll want to do this immediately to any boxster you buy anyway after the sale, so it may not be money spent that wasn't going to be spent any way.
Sure wish I had done that.... would have saved me a ton of money and heartache.