Just picked up an ithaca model-37 featherlight in 20ga. It has a full choke and was made in 1972 according to the serial number. It has been fired but is in almost new condition. I always wanted a 20ga and always liked the ithaca with their bottom ejection. About how much are these worth. I paid $300. I hope I did no over pay. Was the quality of these guns considered good at the time it was made?