Maybe that answer could be part of a "standard checklist" somehow. We all know a 5 year old warehouse machine lease return with 8000 hours maintained as promised by a dealership should have plenty of life left. Add loading trucks up a ramp- now the tranny should have a shortened life. A one " bump at the bottom of the ramp and mast mounting bushings and steer axle thrust bearings are probably affected. Did the customer change tires at the agreed time?? The front of the bottom of the mast might show you this, and as we know running tires beyond a service limit will beat a truck to death.
I think worth noting, IF THE ORIGINAL DEALERSHIP FELT COMFORTABLE SELLING THE MACHINE TO HIS EXISTING CUSTOMER BASE, IT WOULD PROBABLY NEVER MAKE IT TO THE INTERNET FOR SALE!!