Impossible to answer without a DETAILED description.
40-100
100 or so
100-300 USD
Blue Book of Gun Values
How much a Springfield 16-gauge single shot is worth largely depends on the condition of the rifle. In good condition, it is valued at about 70 US dollars.
300 or so
100-1000 depending on specifics
how much is a 22 cal single shot rife by w.h davenport worth made in 1891
$200 to$300 in canada depending on condition
$50-$85, depending on condition
$100-$150
100 or so