[JFP in PA]

He was looking for a scan tool to specifically read the number of over revs (ignitions) on cars he is looking at; which is a very good idea as it will give you some idea of how the car has been treated, and would let him see any pending codes, specifically with the gear box, as well as the systems state of readiness (has someone just cleared codes before you look at the car). all of which are a worthwhile "first look" before sending the car to get a through PPI.