The first generation Express,
The first generation Express, J5, C25 and Ducato, same car /w different badge.
Have proven to last. But nowadays mileage, rust and lack of maintenance have taken their toll on most cars. Not as high of a fixed value as a VW. Should definately be considered, however a newer generation car will have better brakes, mileage, safety, comfort, hp, etc and weighs 1000 kg less.
If you plan to restore and build your own van, the price of restoring a 20y old car and restoring a 10y old wont differ that much. Thus I’d reccomend the younger model. PSA and VW both make great vans. The problem lies in finding one thats not mistreated. My 2 cents.