hi overider, and congratulations on your taste!
The first place to check with vans is the GUTTERS. Repair sections are available for the whole of the cargo section gutter run, but welding them in in such a way that you don't distort the cargo area, making it difficult or impossible to fit back on to the chassis and bolt to the cab, is a very tricky, very specialised job = expense.
Then the rear light clusters. These will almost certainly need doing, again a repair panel is available, but this time is fairly routine to weld in.
Check the rear valance - the bit which folds in, above the rear number plate. On either side of this, right at the edges, is a bracket which sits on the rear ends of the chassis legs. This is very often corroded, sometimes almost completely gone. If it's rusty it will need fixing - no huge deal apart from the labour required to take the cargo area off the chassis and cab, to get at the brackets.
Take a magnet with you to check for honest metal. My van had up to a centimetre of filler plastered over it under the shiny shiny paint, to hide many dents and dings.
Check the rear doors are okay, often they are dented badly in the bottom half. If this is the case the metal will need to be shrunk and reshaped by an experienced panel-beater.
Get underneath the van with your magnet and a small implement like a screwdriver, and tap and test the whole of the chassis. Chassis problems can be fixed but can be expensive.
Have a look at the roof of the cargo section, you will need a ladder or chair to stand on for this unless you are eight feet tall. Dents and hollow areas?
There will be loads I've forgotten but those are my initial reflex thoughts - wiser and more experienced heads than mine will be along to offer their advice!
A lot depends on what you can live with - ie tatty is fine as long as it is roadworthy... but if you want an immaculate example then it costs a fair bit.
If you are an expert welder and panel-beater then buy the van whatever its condition, and get it sorted and back on the road! the more the merrier!!
Good luck! and let us know how you get on!
wibble xx
