Re: Sharps Carbine
I know of no way to determine who owned or was issued that carbine in the Civil War or who may have owned it later. If possible, you might search your family records to determine if it can be traced but outside that, I think a search would be pointless. A good provenance (trace of ownership) can add to the value of such a gun, even if the previous owners were not especially noted or notorious. Needless to say, documented prior ownership by a prominent person would significantly increase the value.
The carbine looks to be in good condition. If the serial number does not have a "C" in front of it, it is a Model 1859 in the first series, serial numbers 30,000-75,000. The Sharps was a common Civil War carbine; they had 22" barrels and a pellet type primer mechanism. More pictures of the gun overall would help, but I would WAG at one in that condition bringing $5000-6000, with the high side dependent on good wood and a functioning primer mechanism.