Not much, $100 to $120.
50-150
50-115
I presume you are asking about a Marlin model 120 pump action shotgun. In good condition a standard 120 is worth about $200-$250. If you are asking about The Revelation model 120 that was manufactured for Western Auto Supply by Marlin, then you are looking at a generic model 60. Worth about $75-$125 dependent on condition.
50-100
25-125 USD
The Revelation model 120, .22 RF RIFLE was manufactured for Western Auto Supply by Marlin, its a generic model 60. Worth about $75-$125 dependent on condition. These guns generally have no collector value.
We need make, model, and condition to get you an answer.
No public sn data available
Best to ask a gunmsith for assistance
10-125 USD or so
the western auto model 120 was made by marlin.The marlin model 99 was made between 1959-1960.