You need a few more pieces of information, such as is this designated simply a 336, or does it have further designations like SC or RC, etc.
Is the bore mint, or is it spotty, dark, or pitted ?
Don't let outside appearances fool you into believing that the inner workings are just as nice.
If all is in good shape, then I would put a minimum value of $175 and if it is a rarer, more collectible rifle, then the maximum could be double that or better.
Let us know the details.
Ranger