these values have been between 250-350 dollars.
Impossible to answer without a DETAILED description of ALL markings.
$500
100-425 dollars
What is the value of a 03 a3
100-400 or so
250-450
Remington's website states manufacture started in 1981. Call Remington.
You won't get you answer by serial no unless you call the factory. However you will from the barrel codes listed on the Remington Society of America here: http://remingtonsociety.com/rsa/questions/barrelcodes
about $250 in clean condition
$250-$400, depending on grade and condition.
100-400 USD
Yes you can. I have shot some in my dads Rem 7400. If you do shoot it. treat it likes it is corrosive and clean the gun promptly and properly.