To determine the age of a Remington Model 870 Wingmaster 12 gauge with a 3-inch chamber, you need the serial number, as Remington's serial numbering system can help identify the year of manufacture. Generally, you can find resources online or consult Remington's customer service for serial number lookup. Without the specific serial number, it's impossible to determine the exact age of the shotgun.
D081337n
$200
10-350 USD or so
Check the Remington Society of America, date barrel codes and location. http://remingtonsociety.com/rsa/questions/barrelcodes
No such model in the Remington line.
how much is a remington umc 12 gauge serial number 247442
Serial 718943w
3
remington model1100 410 serial n283970h
300
The Remington Model 1100 shotgun is still in production, hence it would be worth no more than list price - and probably less, if it has been used at all.
The average price of a Remington 870 Express Magnum pump 12 gauge shotgun "brand new" is about 300-450 dollars. I got mine used for $250