Originally Posted by Kurt V
I would not look at either of those books when coming up with what an old bike sells for. They are way off most time on real world values.
Best thing to do is look at ebay, craigslist, etc. to at least see what the asking prices are. Then come here to get some real world opinions on the value of the bike in question.
Checking asking prices has no meaning compared to seeing actual sales prices. Search completed auctions. Over the course of several months you will see not even 1 in 5 airheads sell, and you will see what the real market is for the various ones that actually sell. That is the real market value whether you like it or not.