I was thinking it would be good idea to kick off a what too look for topic. My contribution: - One should take a Look down the side of the van to make sure it is true (Straight) I have seen them bent. Some time from overloading and other times from poor construction.
Then there is the floor make sure it does not feel spongy when walking on it. If the underside is not treated it will absorb moisture.
I have come across some vans that have had a tape used to seal around windows and other joins. This stuff is okay for a couple of years if the van is kept under cover but it becomes porous after awhile. It saves time in the construction phase & generates work for the service people later on.
We went to look at a 1977 Millard yesterday and decided not to buy it after reading your tips and checking if chassis was straight. We pulled a string line along the bottom of one side and there was a 15-20 mm gap in the middle. Now I’m wondering to myself, is this how the chassis starts bending and it would gradually get worst while traveling or this amount of sag is normal? It’s a 16 foot van.
The last house I bought I carried in a clipboard with sub headings "bathroom/ kitchen/ garage etc., the real estate agent suggested I was somewhat though, I replied that I was not here to muck around as I was presenting offers on five houses that day & my offer was the only one I would make.
I had my price accepted.
I suggest that this procedure would work with buying a caravan, tell them you are looking at more than one, funny how the price suddenly reduces.