yosshimura- When we sold the SDL the buyer had it checked by a trusted mechanic who checked all the things you listed before (compression, a/c cooling, engine cooling, suspension, brakes, electrical, transmission), the guy even drove it for a while. The mechanic gave the buyer a list of things that coud be in better shape and an estimate. From there we arrived at a fair price and our baby was on its way to a new loving home
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Try and see if the shop doing the inspection will give you a credit if you bring the car back to them.