ammoclip.com $18 plus shipping The Glenfield model 25 was made by Marlin as the model 80
Your Glenfield Model 25 is actually a Marlin Model 80 with sling swivels. According to leverguns.com Forums all of the Glenfield rifles were numbered right along with the Marlines. According to http://armscollectors.com/sn/marlinlookup.php your rifle was manufactured in 1973.
50 to 80 dollars
Early 80's
Numrich gun parts, look under Marlin/Glenfield parts list
Glenfield Model 65 - manufactured in 1968; it was essentially identical to the Model 60 with the exception of a brass exterior magazine tube; it was made for Oklahoma Tire & Supply Co. as for the value: poor cond. 70$ fair: 100-125$ good-very good 130-160$ i just picked one up for 80 and saw a nice one at a pawn shop for 139.00
Impossible to answer since you don't state who made it.
The Marlin model 20 was introduced in 1966. It became the model 80. Value is approx. $125. to $160. Answer courtesy of Teddy Roosevelt at Gallery of Guns
The problem is- there was no Model 80 pump rifle. However, there IS a Model 90- with a 9 that is often misread as an 8. That serial number was made in 1922.
from 1968- 1973 the year is the first two digits in the serial from after 1973 subtract the first two digits from 100 (ex 2011645 - 100-20=80). before 1968 there are no serial # on .22 cal firearms.
The marlin model 80dl was made by marlin from 1940-1965.
The Marlin model 80 was made from 1934 to 1939. Later improvements of the original model 80 such as the 80E, 80C, 80DL & 80G were made all the way up to 1965. There were many sight & stock configurations giving the rifle a different model number suffix.