Re: what do i have ?
The Marlin 39 is one of the best lever 22s around. Your serial number starting in K means it was made in 1953.
Marlin 60 is a fine 22 automatic.
That Snake Charmer is a 410 gauge, not a 10 gauge. Little stainless singleshot with a pistol grip. Designed for fishermen to carry in their boats in case of snakes on the river. Buttplate moves out of the way giving access to storage for three (I think) spare shells.
No idea about the Protector 20 gauge.
Higgins could be a lot of things. J.C. Higgins was a store brand sold by Sears, on rifles, pistols and shotguns. Need more info.
Not up on the New England Firearms guns, so don't know if that Pardner is a rifle, shotgun or pistol. Someone else probably will, though. NEF is pretty good, though inexpensive.
I'd like to see a picture of that S&W US Secret Service.
High Standard High Sierra is good, inexpensive double action 22 revolver that looks like a single action cowboy gun.
US Revolver Company was the cheap gun of Iver Johnson, like Chevy and Cadillac are both GM, but one is much more expensive than the other.
The Russian-made SKS is more popular than the other countries', and as a result will get more money if you sell it. Good gun, although heavy for its caliber.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.