Depending on EXACTLY what you have and its condition, 50 to a few thousand USD.
look on the net for a marlin gun collectors site, they have that info.
I happen to have the same rifle. I have been looking for worth and owners manuals for the gun and the only info i can find on the gun is it was made in 1983.
The Gun Trader's Guide gives $185 for the Marlin AS 30-30 in NRA Good condition
If the gun is in perfect shape it is worth not more than $100
marlin 12 gauge bolt action goose guns sell for about $200 in great condition
I to have this gun and yes it is the same to take apart. I guess the gun was made only one year and that was in 1979.
From what I understand from research, the Marlin No. 42 was manufactured one year 1922. I have seen prices rangeing from $300 to $2200 for a trench gun style 12 Ga. I guess it mostly depends on condition and how much a particular person wants your particular gun.
The marlin model 336, 32 special was made in 1949. f25689=the letter in front of the number justifies the year.
The value of a Marlin Cal bolt action model 187 gun depends on its condition. This gun in excellent condition is worth between 90.00 and 135.00 as of 2014.
We need the model.
$80- $150, if it has the magazine, and if it's in decent shape.
These utility .22 bolt actions can be found in secondhand gun racks for $50-$75.