Value of jc higgens model 50 30-6?

I have a JC Higgins model 60 in pristine condition, and it it worth, supposedly, around $150. But, it is a GREAT gun, and to me, worth a whole lot more. It was the first gas-operated semi-auto shotgun on the market, and kicks a lot less than a newer gas-operated Remington semi-auto than I've got. I'll never part with it. Al In good to Excellent con . 125 to 200 dollars these guns came out in 1956 and when they first were introduced they were one of the most advanced semi autos out there they are still nice guns and have some value