Your shotgun was made for Sears by Stevens, and is their model 311. It should take 2.5 inch and 3 inch .410 shells.
Made by Savage/Stevens, same as the Model 311. Value $150-$300.
Roughly the same as the base Stevens 311A. $175-$300 depending on condition and the buyer. www.countrygunsmith.net
Would have been made after WW2 through the 1960's. Value up to $250.
A fully functional utility double-barrel shotgun should sell between $150 and $250, depending on condition. Being a 16 gauge will increase the value a bit in some areas of the country and reduce it in other places.
I need butt end of a duble barrowl shotgun 1017 sears.
Try e-gunparts.com
Sears vendor code 101 7 Savage Stevens same Stevens 311 try Numrich arms gun parts West Hurley New York.
"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.
The factors of 1017 are: 1, 3, 9, 113, 339, 1017.
1017 = MXVII
735
-282 + (-1017) = -282 - 1017 = -1299