Hi Craig,
The truck is a BJ40 , produced in April/May 1975. It's an early one as production started in February that year. It was built as a hardtop with barn type rear doors. 3litre diesel with a 4 speed is stock for that model.
Check the seller's paperwork does not list as a FJ45 because it is a BJ40 and you may need a Certificate of Origin to import (but the US may be different). If you are still in CR then check the underside for rust, and where the chassis humps over the front axle as they can crack there, if they've had a hard life. Check the rear body cross member (above the rear chassis cross member).
This diesel engine is not that powerful - you're not going anywhere in a hurry with it but it will get you there and back and over almost anything. It has Mud tyres on it which will be noisy and will wear quickly on the road. If there's a history or documentation with it - take it. Spares are not a problem -
www.sor.com are specialists in 40s based in LA.
To get 4wd you have to lock the front hubs in - you have Warn units and it's a simple twist on each side. Don't leave them locked in on the road. Check the steering - it works off a central balance and the bearing does wear. I don't recognise the make of tyre but I use BFGs on mine and they suit these trucks really well. I just renewed mine only because the Spanish annual test requires the tyres to be less than ten years old and mine were ten - still with loads of tread on them.
Having driven the 40, check underneath for any oil leaks, same with gearbox and transfer box and axles. Look at the hub cups - they should be shiny and not coated in old grease. It looks like it has a radio - don't worry without sound deadening materials fitted it will sound like a dog barking in a bucket!
Check that the hi/low ratio works and that the 4wd engages. Second short gear stick upper left is hi; down and to the right to select Low. Engage the front hubs and try it on a rough surface. Make sure that all moves and selects properly.
In your original post you said some suspension work was needed. How so and what?
The fuel tank is under the passenger seat therefore inside the cab but is covered. And the fuse box is also inside the cab on the right hand footwell. Check the floor under the covering in the footwells.
Price sounds ok. Most are looking for a restored or restorable so the price may reflect that. It should be 24v but some have been converted to 12v. Mine's 24 throughout and I have a dropper to run the CB(off roading) and phone charger.
Hope that helps.
I'm leaving for the UK in the morning so won't be able to respond until Friday, so get under it and all round it - they're pretty good to work on, straight forward and old style engineering and maintained well ultra-reliable.
Regards,
Rodger