Hi Mick,
I've had a '77 S3, Disco 2, Def 130 and now a P38. So far, the P38 has been the best of them all... It doesn't cost a shed load to keep up and going or even to repair. (unless you get "original" LR parts... I get my parts from fleabay UK at about 1/4 of the price here, but that's another thread!)
Things to look for are:
Service history. ALWAYS service history!
If you see a "Check book" symbol on the Hevac display, take it to a stealer to plug into diagnostics (someone here may even be able to help) as it may be a simple fix, but it may be a $1000 fix. Either way, get it checked.
If the roof lining is sagging, as they do, use this as a bargaining point. In all reality, with a couple hours of your time removing it taking it to a trim shop and putting it back, will cost under $300.
Try to get a post 99 model. These had the "Thor" motor Bosch electrics which are arguably better...
https://www.aulro.com/afvb/images/im...015/04/893.jpg
Pop your hood. Do you see a rectangular plenum chamber with '4.0' or '4.6' embossed on the center of your engine? If so, you have a GEMS engine. BOSCH engines will have a collection of tubes in center and no such label. (Thor)
Either way, they are great and absolutely in another class. Well worth it I say!