the value of our rifle

Thank you in advance!We have a Marlin Glenfield 22 cal.Model 40 semi automatic serial number 21454058 in good condition. We bought the gun about 20 or 25 years ago used.We have no Idea how old it is or its value, my husband just liked the gun and the way it shot. He is no longer able due to health reasons to shoot and is considering selling it, but we need to know its worth first.It has scrolled detailing in the metal work and checker pattern in the wood. It is a very nice gun and in extremly good condition for its age and all original.

hi mammie,
i've researched and can't find any info on a marlin/glenfield model 40. model 60,49,88 and a few others but no model 40. if you could upload a picture and double check the markings it'ld make the id process alot easier.
Kim