Had one for 7 years, overall loved it.
Yes they can be a bit jucy but have plenty of grunt in 2.5 TD form.
Nearly all are auto and its a good sensible system.
Prices vary a lot, full camper conversions are usually 6K+. Depends what you need it for but as a camper they are so much better than the rest for the same money. You dont get electric roof,mirrors,blinds,door,windows etc in a VW for 6K.
They also hold their money very well my one cost nothing apart from the usual, servicing, fuel insurance Tax etc in 7 years and I got exactly the same money when I sold it back to the same guy 7 years later.
CHECK CAM BELT. They are all imported so if you seller cant prove cambelt was done haggle on price.
Lastly, get an Insurance quote in writing, some dont like imported cars or campers with unknown conversions.
Good luck.