Hello
Sounds like a nice project for somebody!
Always difficult to put a value on something without seeing it, a lot will also depend on how far stripped down it is and other bits that turn out to be missing.. Are the engine and gearbox in bits? Presuming its on girders-are these in one piece? Also condition of individual parts will affect price..
If the dating and colours are correct then this would probably have been on service in North Africa around 1942?
How much are you looking to get for the bike? If you put an advert on here in the for sale section with plenty of pictures then I'm sure it would create much interest, otherwise take a chance and put it on ebay with an honest description, plenty of pictures and no reserve and it will definitely sell..
If I was close by then id definitely be having a look!
Cheers,
Rich