This has just popped up on Ebay:
1971 Dormobile with a starting price of £7.5k.
Looks quite respectable and with original interior, though it does have a Ford Essex petrol engine and aftermarket (or possibly Wolf?) wheels fitted.
I had a 109" with the Essex engine - very smooth, not as quiet as a 2.25 petrol but more economical. I used to get around 20mpg average, and that was driving it pretty hard as I loved the sound of the engine on full bore

It might be an interesting tester for current values

Cheers,
Robin.