Fiat Ducato.
What to Check Before Buying.

The Fiat Ducato is Europe's best-selling large van, widely used as a commercial workhorse, motorhome base, and camper conversion platform. Its popularity means plenty of used examples are available, but many have lived hard lives with high mileage and heavy loads. Buyers should pay close attention to service history, structural condition, and signs of commercial use before committing to a purchase.

The average used car has 3+ known model faults the seller won't mention.