Friend bought a 4x4 one that had had the original engine diesel engine replaced by one out of a passat and with the original gearbox meant the engine was over reving and that killed the engine. It is also needing quite a bit or rusty metal to be cut out and replaced.
VW transporters are ridiculously overpriced imo. Transit or look at Honda stepwagon / Toyota Alphard / Nissan elgrand.