Mine is about $22,000. However, that is a LEGAL, transferrable military select fire model. The civilian semi auto varies from about $400-$900, depending on exact model.
The T-900 Fire Control System is a new trigger mechanism for Marlin rim-fire rifles. Go to Marlinfirearms.com for more info.
900
The 2000 model Ninja 900 has 128 hp.
$900
Your harrington and richardson model 900 was made between the years 1962-1973.
12 gauge
50-125
The Ithaca Model 900 XL is a later version of the Ithaca Model 900 shotgun. The XL model typically featured an improved design, larger capacity, and other enhancements compared to the original Model 900. It may have included upgrades to the stock, barrel length, or other features for improved performance.
$600 would be a good price -- $900 is too much
900
500 or so