Rupp stuff is worth whatever people are willing to pay...
Everything in the world is like that. However creating a false shortage, or panic buying, of faddish trends, (Pet Rocks for example) do not sustain a market. They merely line the pockets of those who get in first.
If people are buying rupp parts at high prices, are they really overpaying? or establishing the value of something?
The established value is only in the mind of the established buyer, or interested party hoping his like items are valuable too. The fallacy is that the prices will fall, once the supply exceeds the practice of over-paying. Capgun for example, just realized he has $60 worth of Rupp bolts. He's already done the math.
Guess what? Him having six of them in good shape, plus a few more, just crapped on that $10 benchmark. (Or the $6 one)
I've sold several bikes here as well as rollers for far less than anyone else had ever asked for simular. My value-added was in the hobby itself, the creative process, the work. Thus I took enjoyment in reducing the value of the particular bikes from those who worked so hard to increase the value, by selling to people who otherwise could not have afforded it.
The antithesis of someone who watches price trends on hobbies in the hopes his collection increases in value.
This is a hobby to most of us. Not a job. $10 for a rusty bolt? Really? What an insult.