Pics could tell a lot. If it is covered in fresh underseal, that tells you just that, it's undersealed.
It may well been repaired,- but to what standard, good or bodged, then hidden.
Jap imports tend to fare better over there, as they don't have our harsh winters/salt, but when was it imported, could be a long time ago,in which any rot might take hold, determining what repairs have been done underneath and elsewhere.
I know nothing of Amazons, but as with all vehicles of age or younger, you could expect some repairs.
As you give an indication the dealer has repaired/ spent a lot of money on it, it is unlikely there are bills/ receipts to back this up
Personally, I would take a vehicle that is honest in visual, rather than something that has been covered up.
See what the pictures tell you. J.M.H.O.
