They all say it wasn't bought at auction... it's the new line that comes after:
- One owner, LOW KMs, No accidents
- Owner was a little old Japanese lady, never drove the car
- Little old lady lost the logbooks - whoops!
- Japan is a small country, they don't drive far
- Japanese have rough hands so all that wear on the wheel/shift is normal
- Japanese don't like to put servicing stickers on their cars because they look ugly
- Oh and it wasn't bought at auction
Talk to any well reputed broker (J-Spec, Iron Chef, Prestige Motorsport) about how hard it is to buy vehicles in Japan through the local dealer networks. The chances an imported car was not bought at auction either directly by the importer or by their chosen Japanese exporter are extremely slim - buying at auction is too cheap and convenient.
If they can't supply the auction sheet AND de-registration certificate, see if you can get hold of them yourself or find another seller that can.