If that is a lightning large frame express, it was the 4th one produced in 1892 (5700-5999)
your rifle was manufactured in 1894.
The Colt lighting .22 rifle with that serial number was made in 1899.
1896
What is the age of a Colt rifle serial SLD25319
http://www.coltparts.com/Dates_of_Mfg.html According to the above website, the rifle would have been made in 1893!
The Sn crosses between 1892/93.
You will need to check the internet to find one in similar condition for a realistic price. the range is from 100 to multiple thousands. Your "fair" could be "poor" or "looks like it was drug behind a truck for a thousand miles" or "good".
The small frame .22 rifle with that serial number was made about 1897 (112 years old) and the medium frame .32,.38 &.44 was made in 1888.(121 years old)
Depends on condition and exact configuration. Value range from 20 USD to multiple thousands of USD.
If your Colt Stagecoach was made from 1965 - 1968 it will not have a serial number.
Try Numrich.com
I OWN #712 RANKINFREDERICKC@GMAIL.COM COLT 45-60-300 HEAVY FRAME LIGHTING RIFLE ALL MATCHING NUMBERS VERY GOOD CONDITION YOU TELL ME WHAT IS WORTH.