Bought a 2007 Vivaro hightop from a van dealership, 150k miles but full service history.
Glad it came with a warranty as I noticed a whine on the motorway which meant a gearbox rebuild, then a couple of weeks later the clutch slave cylinder went which would have also been a large bill.
It was nice to drive and handy, but I sold it when the warranty ran out. Wouldnt buy another if Im honest.