Small inexpensive pistol
10-100 usd
20-100 or so
MOre than it is worth
No published sn data that I am aware of.
$150-$200 if in caliber .22LR. These were also made in an obscure caliber known as .22 Special (aka .22 WRF)
No way to tell.
Blue Book of Gun Values
Many .22 caliber rifles made before 1968 did not have serial numbers. This would include your Marlin 100.
I just paid $89 for one at a dealer. It has a six inch barrel, 8 shot, in fair condition, with scratches in bluing. But hey, it should work for a plinker!
I have a regent 22 caliber 8 shot revolver. It is a double action revolver and has a 6 inch barrel. Made in Germany or the parts imported into the US and assembled here. New cost approx $39.00. Go to gunbroker.com, place regent in the search box and there is one listed now for you to see.
That is the serial number- not a model number. Try again.
id give you $100