While I'm quite happy to rent old, mechanically well-maintained aircraft, and normally fly a rather tatty Permit Group owned wood and fabric 54/50* year old Jodel, when renting from the Colorado Flight Centre, I never had a C172 which was as old as 10 years, and they were immaculate - costing about half of what a 25+ year old Pa28 would cost per hour here.
*rebuilt from 2 crashed aircraft, many years before we bought her.