First off, Stevens used that marking from 1886 to 1916. The side lever No. 16 crack shot was made from 1900-1913, but I know of no way to narrow down the date yours was made.
There is a serious collector interest in those old rifles, but they were made in such large numbers that only ones in top condition have any real value.
In new condition, a value guess would be in the $400-500 range; in good condition, $150. But most of those guns had the heck shot out of them by small boys and are in sad shape. If the gun is a family heirloom, its true, but non-monetary, value lies in that fact, not in its condition.
Jim