Oh - I paid $425.00 for mine, and I've got to get a title. I think I paid too much as it has the clutch issues, needed this, that and the other thing, but it's not about the money to me, we're not talking any real money anyway.
Here is what NADA says about the 1970 CT90
Very Good $1,360
Personally, I think they (NADA/KBB) have gone from one extreme to the other. They always used to be too low, now, well, they seem high...