10-200 USD or so
Assuming you mean a Mossberg Model 42M(b), between $75 and $200, depending on condition. These are excellent target rifles.
the model 46a is worth around $150
The only reference I can find to a Mossberg Model A is a spotting telescope. Mossberg does not appear to have used the 'A" designation in it's .22 Rifles, starting with a Model B in the 1930's. See link below for model information-
mossberg 20gauge shotgun mod 185
The Mossberg 46B(b) was only made in 1947-1949, when the model number changed. Excellent target rifle.
worth on Mossberg and sons model 146 b-a with m4d scope 22 cal.
255.00
50-175 usd
Depending on condition, from $100-200.
Check the receiver or barrel.
about $100
IF the rifle has all sights, etc, has not had stock modified, there IS a modest collector's interest in the older Mossberg 22s. $200-$250 is an average price. They shoot VERY well.