It's hard to say exactly without knowing condition. However, these are quite common and usually sell for $75-$200 in 2012.
The value of a J Stevens single barrel 410 shotgun from 1922 depends on its condition. This gun in excellent condition is valued between 125.00 and 150.00 as of 2014.
That patent date identifies a Stevens single shot.
If it is a typical Stevens double or single barrel there should be a metal lever towards the back of the stock slide it left or right and tilt the barrel down.
50-100 USD
In 2012, $70-$200 depending on condition.
Old catalogs, old gun books.
If it is not marked on the barrel, you should have a gunsmith measure the chamber length.
Under $100.
Wisners list it but dont answer e-mails
Complete description and pictures would help, otherwise, can't be done.
$35 to $75, depending on condition.
modle #