No fear, don't worry about your beloved rusty Poojoey Pxxxxxx. In the big picture, the number of enthusiast and actual vintage lightweights is very small. No matter the numbers or valuation, its not going to disappear. We like our old schtuff.
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What IS going to disappear are the majority of bike shops. And the US-China tarrif don't mean beans.
Hydroformed ally, budget Shimano dual control 700c jobbies are sold for pittance. Not even online, examples are retail stores.