I don't think there is such a model. There is a 336 30-30 in many variations, barrel length's, barrel shapes (octagon) stocks shape and material. Then there is a Marlin 39 which is a 22 calibre and many variations the same as the 336. So given the fact Marlin is not the Marlin we knew of in yesteryear. It was bought by Remington and many say the quality has gone down along with value. So to put a value on it, you must almost be a collector and you would evaluate the gun on each individual model (configuration). And then take into consideration what is it worth to you. Are you going to hunt/shoot it or just hang it in a display case and look at it. I say both, the lever guns are fun to operate/shoot and they are a beautifully crafted piece of Americana.
I know this is not the answer the individual was looking for, it is my 2 cents.
All depends on condition, model, accessories,...etc.
50-350 USD or so
$350.00 to 500.00 depending on condition
I just bought one that is @ 32 years old today and paid $225.00.
Yes
Marlin
there is a marlin collectors site or gunbroker.com
1990
Not enough information given to answer this question.
1984
30
By including the serial number in your question,we will be able to answer when your Marlin model 336 was produced.