internet firearms auction sites will be your best bet followed by your local gun store and gun show.
Your Marlin model 336 will be valued between 200-350 dollars,depending on the overall condition of your rifle and a good bore.
300.00 in good condition
The marlin model 39A is the rifle model,while the Marlin model 39M is the carbine model.
what is a model 65 golden 50 worth
the model 42 is the same as the marlin model 80
Try looking up www.e-gunparts.com
When looking at the exploded view drawings of both models it certainly looks like they would be interchangeable.
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.
model 55 the original marlin goose gun
Marlin 81
Try e-gunparts.com
Made between 1936 and 1945