According to the the Blue Book of Gun Values 19th edition(which was published in 1998) your shotgun was manufactured by Winchester for sears and is a model 1200. The 100%(mint condition) value for a field model is listed as $220. The values rise slightly from there as the grades and options improve.
The Sears Ranger 105-20 16 gauge shotgun came out in the 1930s. The Sears Ranger shotgun has a 26-inch barrel.
Sears Roebuck co.
Depends on model and condition. Typically $100-$150.
No age records, most likely a Mossberg shotgun, values $50-$75.
A bolt action shotgun in 12 gauge.
The JC Higgins 583.16 is a bolt-action 12ga shotgun made for Sears by High Standard in 1948/1949.
I believe that your Sears shotgun is a Winchester model 37A shotgun that was made for Sears Roebuck And Co,.