Proofhouse.com will get you in the ball park for age. Value depends on a variety of things you don't mention. Broad price range = 300-2000.
With the serial number that you have provided,your Winchester model 88 lever action rifle was made in the year 1962.
with the serial number that you have provided,your Winchester model 1873 lever action rifle was made by Winchester in the year 1886.
Your Winchester model 1897 pump action shotgun cannot be dated without you providing the serial number to it.
With the serial number that you provided,your Winchester model 1897 pump action shotgun was made by Winchester in 1924.
With the serial number that you supplied,your Winchester model 1912,pump action shotgun was made in 1961.
With the serial number that you provided,your Winchester model 12 pump action shotgun was made in the year 1923.
With the serial number that you have provided,your Winchester model 70 bolt action rifle was made in the year 1982.
With the serial number that you provided.Your Winchester model 88 lever action rifle was made in 1960.
With the serial number that you have provided,your Winchester model 1897 pump action shotgun was made in the year 1899.
Impossible to answer without the serial number.
A excellent condition model 1906 pump action rifle will bring between 550-850 dollars on today,s market.Some areas of the country will pay more,some will pay slightly less.
With the serial number that you provided,your Winchester model 1912 pump action shotgun was produced in the year 1949.