There aren't many 1903's or 1903A3's, in decent condition, up here. For a 1903, the important part is the serial number. Springfield made rifles above 800,000 ad Rock Island made rifles above 285,507 are considered safe to shoot. Below those numbers, they aren't. Has to do with the heat treating in the factory. 1903A3's don't have this issue.
Wolverine's Mk I was made to accept the Pedersen Device(add-on that made the rifle into semi-auto with a bolt, mag and special cartridge. You won't find one.). There seems to be a perception that that makes them worth more. That one is in great condition though. You don't see many 1903's, of any mark, in that condition.
"...a Sharps carbine..." A real antique one or a modern re-pro? Shooter's Choice, in Waterloo, Ontario wants $1,320.00 for a Pedersoli reproduction, 1874, 22" barreled, cavalry carbine, in .45-70. Haven't a clue what a real one is worth.