Difficult to answer because of the number of variations of the 1873 Springfield Trapdoor Rifle. A good place to start looking to identify your specific rifle is: THE U.S. SPRINGFIELD TRAPDOOR RIFLE INFORMATION CENTER @ http://www.trapdoorcollector.com/
With the serial number that you provided,your Springfield model trapdoor rifle was made by Springfield armory in 1883.
your springfield trapdoor rifle was made in 1880,with the serial number that you provided.
yout trapdoor rifle was made in 1878
With the serial number that you provided,your Springfield model 1873 trapdoor model rifle was produced in the year 1875.
Your serial number indicates that your Springfield trapdoor model rifle was made in the year 1887.
With the serial number that you supplied,your Springfield model 1873 Trapdoor rifle was made in the year 1884.
A Springfield trapdoor weighs roughly ten pounds for the long gun version and nine pounds with the short Carbine version.
rifle made in 1887
600-1500 dollars depending on overall condition of your rifle.
10-1000 USD or more depending on specifics