Somewhere between $1 and $10,000. The value of ANY firearm is based on the exact MAKE, MODEL and CONDITION. There were several models of Sharps rifles, and condition will play a major role in the value of an antique. You need to pack up your (unloaded) rifle and take it to a gun show near you, where collectors and dealers are gathered in one handy spot for your convenience, and get a hands on assessment. Good luck.
A few hundred to multiple thousands of USD depending on EXACTLY what you have.
4570 ,
It could be considerable depending on the rifles overall original condition.If your rifle has not been changed from its original condition,anywhere from 2,000-4,250 dollars.
You have one of the variations of Marlin 1895 - the G, GS, S, Cowboy, or Guide Gun. The value depends on which model you have and who you can find to buy it. The prices run from $400 to $700.
$500 to $1000
The 45/70 is best kept in the 0-150 yard range out of a lever gun.
The best answer I can give you is to post at http://www.trapdoorcollector.com/
4570 g = 4570000 mg
There are 1000 millimetres in one metre. Therefore, 4570 millimetres is equal to 4570/1000 = 4.57 metres.
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Maker and price