Mossberg used to make extremely good, inexpensive .22 rifles. I wish that they still did.
My very first rifle, a gift when I was about 12, was a M.151. Later, I got myself a M.144 for target shooting. I was very well satisfied with both of them.
Yours doesn't seem to be worth much: Maybe $100.00, if in almost-perfect condition.
Don't sell it.
Use it, and hand it down to the next generation.