"J.C. Higgins" was used by Sears as a brand name from 1946 to 1962. That should gve you a general idea of age. As far as I can tell, the 16 GA was manufactured throughout that time period. As for price, I payed $225, and have seen them from 175 to 250 depending on condition. For a more certain answer, check out the gun bluebook.
1955?
Would need the specific model number.
The JC Higgins Model 31 rifle was manufactured for Sears and Roebuck by Hi Standard.
1966 to 1988
"Your" Winchester Model 21 Double Barrel Shotgun was manufactured in 1933, giving it an age of 77 years, as of 2010.
The J.C. Higgins Model 33 was manufactured by the High Standard company.
1950's-1960's
The J.C. Higgins Model 43 was manufactured by Marlin Firearms. It is the same as the marlin Model 83 Blackhawk_45 The J.C. Higgins Model 43 was manufactured by Marlin Firearms. It is the same as the marlin Model 83 Blackhawk_45
when was the j. c. Higgins model 41 serial number 103,19780 manufactured
Winchester
Remington
no