it is hard to tell if the IMS has already been done, the particular car im looking at has no service records. even a PSI wont test for IMS - where does this leave a buyer? Should i wait for right color, year, price with service history. Personally, I want a yellow or red boxster, so do I buy a different color if I know it was one owner and have the history. there are a ton of these for sale so it is hard to decide.