What is the value on a antique J.Stevens model 335, 12 ga. double barrel, side x side shotgun ?

1) That gun isn't an antique. By federal law, an "antique" firearm would be one that was made before 1898.

2) Without knowing the condition the gun is in, it is impossible for us to appraise the gun. I would expect that it's worth somewhere between $125 and $250, given that Stevens is not a high-end gunmaker and most of their guns were working-class guns intended to put food on the table.

have one.not much,auction mybe 800 in perfect never fired condition .the average 300 to 500.i bought mine 10 years ago 200 bucks.they made a lot of these guns and most are still in service.

whatever your appraiser says it's worth. we can't see it from here.