SC are somewhat more desirable. I would say that these are not collector guns anyway, so who cares about a refinish.
It is a Marlin .35
It is an SC
It is a pre Micro Groove
I would value a nice 336 in 30-30 at $250. I would say that these differences would put it around $350-400. If it has been bubba'd (extra holes fior sling, scope, sights, buggered screws, recoil pad, shortened stock, missing parts like rear sights, sight hood, screws, buttplate, non original anything, etc), then of course it is lower, If it has great wood, then it is higher. There are regional differences too. If you live in lever country, that is good, a shotgun only county is bad.