I viewed the 1970's Dandy yesterday but had to decline. For its age it was in very good condition, the only problem really (but i'm no expert) was the surface mould on all the wooden panels. Could be replaced I'd imagine but unfortunately DIY is just not for us. Our daughter is asthmatic so the mould was not even a slight option.
Will keep looking around for hopefully the perfect camper.
Thanks for your advice on what to look for when viewing.