Hi Chris, We have a short bus , Elfie, thread "elf bus", similar to that.
I had to replace a rusted out driver side floor.
164000 is not much but depending on maintenance procedures you might run into worn glow plugs and injectors.
If it runs smooth , start from cold easily and immediately with no smoke then i think you should be alright. Check for leaks and drips under the car while it is still parked.
We bought ours private and paid $3700 for it . Seen them at auctions go for around 500 to 2500.
Dealers mostly let go of the maintenance papers ... what you do not cannot hurt them
I think the girardin is aluminum skin and floor also so expect little rust there. I think roach?? forgive me if I am wrong has a diesel maintenance page for this engine. I am sure you can glean quite some of that.