As always, the answer is "It depends". Price is related to the condition of the gun, age of the gun, any special features it might have, and the current demand. All that being said - a standard model 37 12 GA Ithaca shotgun, in good condition, usually sells for around $350. You might want to monitor www.gunbroker.com and see what a comparable gun is going for.
Yes, they made it.
you can buy them all day for $250 and down
It depends on the original condition. $250-5,000.
mossberg 20gauge shotgun mod 185
Model 97 serial number 1005298 was manufactured in 1952. Bert H.
The marlin model 28 hammerless shotgun was produced from 1913-1922.
I have a sears and robuck 20 ga. pump with adjustable choke on the end of the barrel
There is no pump-action mod for a Nerf Raider CS-35; it already has a built-in pump-action mod due to the way it is fired.
Savage
With the serial number that you have supplied,your Winchester model 1897 pump action shotgun was made in the year 1907.
toy's R us I can't match the Coast to Coast mod 660 however Savage, Marlin, Stevens, and Mossberg all sold various models to Coast to Coast and all of them made a pump shotgun. One of these manufactures likely made the mod 660. Find a Gun Values book and try to match the model to the photos.
I don't find the Westernfield 530A but be careful: there is a Stevens 530 (1912 to 1918) that is a pump shotgun as well as the Stevens mod 530 (1935 to 1952) double barrel.