Originally Posted by
atufft
I've been told my old steel made in America 531 Double Butted Trek is worth as much as 4x what I paid for it circa 1982. .
You were told wrong. Now if someone offers you that amount in cash, take it.
Typically, the people that give this value advice have not bought or sold a similar model in years.
I have a 1979 710, full Reynolds 531 that year. As a frameset, may be worth $250 to $350 in very good condition.
As investments go, the stock market, real estate, maybe commodities are better choices. But as a hobby, vintage bikes are great.