I don't see where you mentioned the total miles driven on the vehicle. At about 100k miles budget about £3000 for front end work, various bushings, spring repair and the alternator. Transmissions seem to last over 200k miles so other than rubber parts degrading (normal for any vehicle over 100k miles or over 10 years old) you really should only have regular maintenance. The vehicle is very tough and holds up well but you don't know who maintained it and any brand has wear issues.

If they are the original tires you may start seeing sidewall rot even if the tread is in good shape. Personally I always change all fluids (including differentials) when buying a used vehicle, even if they look good.

Run it over some bumps at speed to see if the font springs have sagged. Test all the electrical accessories and the air conditioning. Test the 4WD system. Pay a mechanic to do a pre-purchase inspection. £75-100 is cheap insurance.

We buy a lot of used vehicles and even going over them well and having a mechanic inspect them it seems like there is always at least US$2000 (probably closer to £1500 over there) of work that pops up at first. So have a repair contingent set aside in addition to anything the mechanic finds. If you luck out and nothing needs to be done then you've got funds for some goodies to add to the truck.

 

You' could make great contest on Top Gear EX vs. Jeremy driving a Renault lorry.

 

If its USA origin then all warranty related service and repairs are listed on the OASIS report... so if it spent any time here it will show you what if any work was done under warranty.. there is a section on the forum to post the vin number Is it 2 or 4 wheel drive the one you are considering

 

If you have the vin number, you can get a lot of the dealer svc info here too:
Official Ford, Lincoln & Mercury Owner Site | Personalized Owner Information | FLMowner.com