Had a 06 SWB transit for 6 years now. Its on 145K and all i have had to replace is the alternator.
Had good service record when bought, service it every year and just keeps going. Infact just passed its MOT again this week with no advisories.
Self convert into camper with enough room for two bikes across the back (wider than vw) Got 6 foot double bed, cooker & sink.
The only negative for transits is the rust. I spend a couple of days anually just treating & touching it up and thats enough for it to still look great. Used as my everyday vehicle and love it. Don’t quite understand the VW camper thing, they look nice but not really bothered about that. From what i can see they are just too small inside to do what i want. Can’t see the point in a campervan if you have a bike rack on the back. But thats just my opinion.
As with most vans, check the service record.