100 or so
If it is in like new condition $300. Used and decent $200.
Depending on condition, 85 - 150 dollars.
A Mossberg 22 rifle such as the Plinkster depending on the condition is worth around $150-200.
Depending on condition and completeness, anywhere from $100-$250. There IS collector interest in the older Mossberg 22s, and they are extremely accurate rifles.
It is a Mossberg 800A. Value anywhere from $200-$250, depending on condition, scope, etc.
Depending on condition, anywhere from $50, to $200 for a "like new" rifle. BTW, excellent target rifles.
The Mossberg model 200 slide action 12guage shotgun is worth anywhere from $100 to $250, depending on condition.
This rifle (Mauser Model 2000) is worth $350 in excellent condition.
Depends on WHICH .22 Mossberg, and it's condition. It may be as little as $25, or $250.
50-125 USD
$75-$125, depending on condition.
Depends on the model, caliber, and condition. Could be $25, or $2500. Your question is very broad, somewhat like asking what a Ford automobile is worth.