50-100 usd
A Mossberg 22 rifle such as the Plinkster depending on the condition is worth around $150-200.
There are dozens of different models of the Mossberg 22 rifle. You did not tell us which model, and we need that to give you an answer. Sorry.
50-125
Made in 1976. Link at bottom of page to Mossberg .22 rifle info.
Depends on WHICH .22 Mossberg, and it's condition. It may be as little as $25, or $250.
50-125 or so
There is none on the Mossberg 151M due to the date of manufacture
The mossberg model 151K was made from 1950-1951.
Mossberg (402 Palomino)
Pre 68
Mossberg IIRC
Does not exist.