If somebody has one that they will sell for less than $100, then they can
get away with saying that that is what it is worth. Otherwise, "value"
has no quantifier other than what some buyer and some seller agree on.
My parents sold their 57 Chevy station wagon for $50 in 1965. What is it
worth now?
When I was at Goddard Space Center, we had an 026 connected to a Gerber
Data Digitizer (an oversized etch-a-sketch). When you hit the foot pedal,
it would punch two three digit numbers of the current coordinates of the
crosshairs. That one, surely, would be worth LESS that $100, due to the
extra work that would be required to get that extra stuff out of it.