On an Ithaca model 600 shotgun, the serial number is typically located on the underside of the receiver, near the trigger guard. It may also be found on the barrel, often stamped on the left side. If you're having trouble locating it, consulting the owner’s manual or a gunsmith can provide additional guidance.
Depends on the model and condition. An Ithaca Mdl 37 Featherlight in 16 g in excellent condition is $500-$600 at retail.
50-600 usd
shotgun
The serial number is on the passenger side of the receiver, just rear of the barrel. If there is no serial number your cooey was manufactured before 1968, when no s.n. was required.
Ithaca 500 model shotguns were imported by SKB (japanese manuf.). They are currently selling on gunbroker.com for $600-$1200 depending on condition.
The book "Ithaca Gun Company from the Beginning" is a good source of info. From the serial # it looks like you have a 1912 Flues or NIG model. Depending on its condition, it would probably bring anywhere from $350 to $600 on average, based on what I see these selling for on Gunbroker.com.
$500 up
500 USD or so
new in box lists as 600 lowest quality is 200
$600 all day long
Anywhere from $150-$600, depending on exact model, caiber, and condition.
Impossible to tell without the serial number and all markings on the weapon.