Pause just a bit and take a deep breath. First of all, if there is a vehicle on the planet that can still be in excellent condition inside and out with legit 281k miles.....it IS the species of vehicle you have bought. So the mileage on 100 series Land Cruisers is only a digital numeral and usually says nothing about the reality of the condition.
Allowing a full inspection should give you more legit answers and put your mind at ease temporarily at least.
Btw, My daily driver 2000 LX has 456k miles and my wife's 04 has 378k miles.