It makes a difference what you want to do. If you are primarily intersted in riding bikes that are in decent shape and phrases like "all original paint" mean nothing then the fully restored bikes are too expensive. But pick up a good example of a rideable Classic bike, now thats doable.
I chose a Honda CB400A, because I had not ridden a Hondamatic, and I found it pretty much at the original (new) salesprice, with under 12,000 miles. But I also saw a 2 stroke Kawasaki, at a good price, and a fairly nice Yamahas XS 750. So without further work, I can ride around on an original classic bike. And get 50 mpg, reliably, into the bargain. They are not selling similar general purpose motorcycles any more, they are all skewed to one extreme or another, and they are all (way too) expensive.
That's my view, anyway. You do have to resist repainting it. After that it's all down hill.
From Candy Sapphire Blue to Tahitian Red? Hmmm. I wonder if the decals are out there...