We get called by dealer principals and fleet managers every week with the same question: how do I avoid getting burned on a used fleet purchase? Here's the short version.
Walk before you read
Spend ten minutes walking around every vehicle before you look at a single document. Look at the panels, the tire wear, the bed condition. The vehicle tells you most of what you need to know if you actually look.
OBD-II tells stories
A scan that returns zero codes — including pending and historic — on a vehicle with 80,000 miles is itself a flag. Either the codes were cleared (probably) or the scanner can't read the module (also possible). Real fleets accumulate codes; it's normal.
The maintenance log, or its absence
If the seller can produce a real maintenance log, the vehicle is probably loved. If they can't, you're underwriting an unknown. Price accordingly.
Don't skip the underbody
A creeper and a flashlight tell you more than a Carfax. Rust progression on rocker panels, frame rails, and exhaust hangers. Recent welds where you wouldn't expect them. Evidence of fluid leaks.
Get an outside opinion
This is the obvious self-interested closer, but it's also true: paying a few hundred dollars for an independent inspection on a five- or six-figure vehicle is one of the highest-ROI things you can do.
— Alejandro Murillo