Originally Posted by
Retro Grouch
A bike is worth whatever a seller and a buyer can agree on.
That's an oversimplification. Many things have an intrinsic value that can be (and is) determined by objective valuation. There is at least one "Blue Book" for brand name bicycles that I know of operating online.
Edit:
https://www.bicyclebluebook.com/Sear...83&model=55825