I think when you are in a situation where you can buy a '70's or '80's vintage road bike at a garage sale for $20 and flip it on ebay or Craigslist for $100 to $200 within week is evidence that we are now in that narrow window of golden opportunity. It won't be too long before we will be kicking ourselves for not snatching up as many of these bikes as we could get our hands on.

I am seeing fewer and fewer of even the mid-range factory bikes from the '70's. A tremendous amount of them have been sent to recycling and land-fill, thus making the remaining machines even more rare.

My money says there is better investment in the mid-range bikes right now than in the really high-end collectible bikes.