Don't do it.....
Ive bought numerous vans over the years and the range of quality of vans in the same age and mileage group is astonishing!
Ive converted 3 now and my current one took me about 3 months to find, I was after a Relay and in the end gave up as the quality was so bad. I saw one that on the outside was fine, around 35k miles engine was good but the cab looked like irt had been sandblasted. Couldn't see that in any of the photos before I went to see it.
Similarly staining on the sides from signwriting, corrosion under the ply linings, dents and dings to the roof, possible damage to steering racks/crash repair stuff etc etc etc None of this would be possible without seeing it first.
High mileage is standard for the vw crowd BUT it depends who has used it before, I used to drive other peoples vans for work and I wasn't kind to them!!