Go to Gunbroker and search for Uberti Sharps. Then, google around and see what new ones are currently selling for. I see that Able Arms has new ones for 1200-1500, but those prices vary with the wood. Nicer wood brings a nicer price.
You say it's your favorite gun store, which puts you in a good position. Go talk to the guy and see if he'll knock off a few bucks (or a few hundred) for a valuable customer. Before you drop the hammer on the checkbook, take a close look at the bore. Most of us who shoot Sharps rifles use black powder or BP substitute. Those powders are corrosive and I've seem lots of Sharps with pitted barrels. Surprisingly, pits in a barrel doesn't mean that it won't shoot. I've seen some pitted barrels that shoot very well, but it's something that's nice to know before you write the check.