This is actually a Marlin 120 with a cheaper grade stock. In good condition I would take less than $200.00 for a sturdy and reliable weapon. It has been mechanically compared to the Winchester Model 12.
$200
It has value as a shooter only - not a collector piece. $100-$200.
Marlin started producing the 778 in 1979, production ended in 1984
I am not 100 % sure, but the research I have done indicates that they were produced from 1978-1984, with 1984 being the last year of production. The Marlin Model 120 is the continuation of the Glenfield 778 with some parts being interchangable.
Could your model be 775 or 774, NO 778 model by Savage or Stevens
you can find them here... http://www.e-gunparts.com/productschem.asp?chrMasterModel=082Zz778
In good working condition $150 to $200
I own a glenfield 778 without the magazine plug it can hold a maximum of 6 rounds on in the chamber and 5 in the magazine
The Glenfield Model 778 shotgun, produced by Marlin Firearms in the 1960s and 1970s, had a retail price of approximately $100 to $120 when it was new. Prices varied based on the specific model and any additional features. As with many firearms, the cost could also fluctuate due to regional differences and market conditions at the time.
That model has been obsolete since 1982. You might find a scanned copy available on one of the gun auction sites or eBay.
The value of a Glenfield Model 778 pump shotgun typically ranges from $150 to $300, depending on its condition, age, and any modifications. Collectors and enthusiasts may pay more for models in excellent condition or with original features. It's advisable to check local listings and consult with firearms appraisers for a more accurate valuation based on specific circumstances.
The Glenfield 12 Gauge Model 778 shotgun uses 12-gauge shotgun ammunition. It can fire various types of shells, including birdshot, buckshot, and slugs, depending on the intended use. Standard shell lengths for this shotgun are typically 2¾ inches and 3 inches. Always refer to the manufacturer's specifications for the best performance and safety.