Really, the prices old bikes fetch fluctuate so much it'd be a feat to try to compile anything. & even then it'd be like trying to predict the fluctuations of the stock market by trying to find mathematical patterns over time. Doens't really work that way. For instance, I see you like Hams. I knew of two people each willing to pay $10,000 for a Cunningham. But they both got theirs, and now Hams seem to be worth around $2000-4000, depending on the build. That's a pretty huge range. But as soon as someone else with similar resources gets to thinking nostalgic, and decides they want one, that figure skyrockets again. Fairly typical for bikes of that level. It always comes down to what it's worth to you, and more importantly, what it's worth to someone else looking for one at the same time. It's a crapshoot. But it sure is fun.