if it was the one carried by Doc Holiday at the OK corral ..name your price.
100-450 USD
50-550 usd
50-1000 USD depending on specifics.
if this is there 455 cal gun its about $200 if clean
50-400 usd
Impossible to answer without a detailed description.
100-1000 USD or more.
75 or so
50-500 USD or so.
50-625 usd
0-150 usd
100-1000 USD or more depending on specifics