What is the value of a Universal 30 caliber M1 carbine serial 76450 in good condition?

Made after WW 2, the Universal is a civilian manufactured rifle. In many cases, parts will NOT interchange with the military carbines. A check of recent sales on a gun auction site shows these selling for $350-$450, about half the value of a military M1 Carbine. As a commercially produced rifle, their value is as a shooter, and not as a collector's item.