Then why bother changing it. My van is nearly 8 years old now, but a new one would cost quite a bit more than simply purchasing the van if having it fully ply lined, insulated and waterproofed as my present one is. Then there's the transfer of the TM, racking and LPG tank. Mileage is only 68,000, many similar vans would do that in a year.
In fact mine is going for repair in a couple of weeks, new side panel and sliding door after I forgot about the line of low bollards separating parking areas, which I was parked right tight up to. Jumped back in and swung it over - crunch!
Dave.