So I'm still looking for a trailer and wanted to get some opinions on what's "normal" vs unacceptable/unsafe.
The internet tells me that trailer tires should be replaced every 3-5 years, regardless of tread depth, because of dry rot and/or flat spots that develop (especially when the trailer has been sitting unused). I've seen a number of 8-10 year old trailers being sold that still have the original tires. If that were the only thing wrong with a trailer, I'd use it as a negotiating point and plan on replacing the tires before hauling my horse. But it makes me wonder- do most people blow off the 3-5 year recommendation? Would it be safe to haul a trailer with old tires a few hours home (without a horse) assuming they "look fine"?
Next- rust. Rust is probably unavoidable on a (steel) trailer in Oregon. How much is too much, especially on the undercarriage? Here's one I went to look at recently- does this look good/bad/normal for a 10 year old trailer? Would this need to be sandblasted/repainted? Is it unsafe?