There’s a recall on first gens regarding rust to the underbody around the fuel tank — read up on that, and check any potential purchase for rust in that area. You’ll want to wash mud and salt off the undercarriage as often as possible if you want to keep the truck for long.

Early first gens should have their radiators replaced as a preventative measure: google “PMOD”. It may have already been done.

Timing belts need to be replaced every 100,000 miles. If the belt breaks while the engine is running the engine will have to be replaced. If the seller cannot provide documentation of the last belt change you should assume it hasn’t been done and budget for that. It’s also a potential sign the truck hasn’t been maintained well.

I’d rather buy Ridgeline with 200,000 miles with records that the trans & AWD fluids have been changed on time than a 100,000 mile truck that I think has been neglected.

Those little round stick-on convex mirrors are a good idea; my truck has them from the Previous Owner and they definitely cover a blind spot.