Laura,
I would walk away from it as It's not worth the risk. It could take a while but another van will come along. Having said that, Gumtree have a 2009 Puck and 2004 PuckL on at present.

Colin

The deformation around top hinge is of no concern and should be left. The wind has simply caught the door and pulled the hinge back by probably a mm or so which would provide this shadow. This is fairly normal. The pitting to the front stone guard is normal. You could wire wool or scotchbrite this back and rattle can some new clear lacquer on for £10 and it would look like new. The corrosion around the door and around the bottom of the van is a different matter. You could easily be looking at £1K to £2K to fix this. The chassis corrosion could be a matter of having to lift the van body off the chassis to repair and a similar repair bill. These are worse case scenarios but likely, so best avoid the headache. A good 2006 van would probably be in the region of £8K so you would be no better off and probably have a bad headache.

Colin

Good idea. I think it is fair to say you will have to travel. When in Essex we bought from Berkshire, Belgium, Leicester and Nottingham. If it comes to a long journey just consider a day in the car and a tank of fuel is little cost or inconvenience for the subsequent years of ownership you will enjoy.
If you see something you like then ask for lots of pictures, place a refundable deposit and get to it asap.

Colin

I've sent you a PM