Most of the cars in Used Car Lot have a Device Rating of 2 because they obsolescent and civilian vehicles. Some of them have a Pilot of more than 2, the Toyota Elite and the Phaeton have Pilot 4.
By RAW Pilot is a special System program (page 245) and Response limits System (page 222, under "System"), so a car with Pilot 4 must have a Response of 4 or more.
This would make the Toyota Elite great deal because for 18000 nyuen you get a Response 4 car which is great for nearly all dice rolls a rigger does when jumped-in.
This strangeness didn't exist yet, because there were no vehicles yet with a Pilot of more than 3 and they were at least civilian ( This Old Drone might be an exception, but I don't have it).