Hello I just found your forum. I have a 1967 r100 that my brother brought back from Japan
the Motor is bad, interier ok. It has been in a barn for about 25 years. I would like to sell it but do know what its worth. Any info would be help full. thx

 

That's gonna be a hard one, 'cause I'm sure that modelis all but forgotten by most by now.
Jay Leno may be interested though.He has a Cosmo in his collection. Perhaps he'd like the Cosmoslil' sister tokeep it company?
j/k

Really, I wouldn't know what to tell you.
Have you advertised it on eBay Motors, or Craigslist.com?