One of the things that has changed is that retro/classic/vintage cycle stuff is cool now and is bringing big prices. I work in music electronics and one of the things we saw is that years ago before, just one example tweed Fender amps, started demanding huge prices you couldn't find them. Especially not nice examples. Now they're easy to find and hard to afford.
The good news here is that bike parts are harder to counterfeit than electric guitars and amps.