^^ What Doc says, plus this:
It's worth exactly what someone will pay.
I ought to know what they are worth... I bought <looks sadly at toes> four
of the darned things in the last week
Three are from the same seller though. You know the drill "I'll make you a package deal and toss in a shoulder stock, a few old powder measures and a dozen old cap boxes"...
Don't go crazy on an unfired one if you want a shooter. I am going to resell two of the four after I grade and examine them. I'll keep a shooter and a safe queen and sell one shooter and one safe queen.