KMG in Ca:
AC60480 is the serial number of your marlin 336, the prefix "AC" indicates it was made in 1967.
Here is a link to Marlin serial #s from 1948-1968;
The gold trigger on the 336 Marlin is a nice premium because all Marlins weren't manufactured with them, but it is not a large factor in the overall value of the weapon.
Your 336 in .35 caliber is a plus also because less of these were/are made than in 30-30 caliber. This places them in slightly more of a demand than the 30-30 even though 35 cal ammo is more costly but again not a not a huge premium over the 30-30.
Given the above, the real value of your Marlin will depend on the it's functional and esthetic condition which we couldn't begin to determine without a few close up photos of the various parts of the weapon (stock, receiver, forend, barrel, sights plus the top and bottom of the rifle). Keep in mind any scratches on the wood and metal, any blueing beginning to show wear, plus any presence of rust and the degree of it (including in the bore)as well as any missing parts (such as the rear sight or front sight hood) will deminish the overall value. Likewise for any feeding/extraction problems with the weapon.
Keep in mind all asking prices are subjective. Also, any and all plus's and minus's of your weapon are points to barter over in trying to arrive at a selling point both can agree on as is the fact of just how much the perspective buyer actually wants the weapon.
Generally if the internal parts and bore are in good shape and the weapon shows only 'fair wear and tear' esthetically (overall about in 90% condition or better) then the value should be between $375 to to $400 maybe as high as $425. New 336c Marlins in .35 caliber can be found for generally $499 to $525 (+ or -).
Hope this info is helpful too you and good luck.