But still no answer
Sounds like the gun is an auto? I've had a SKB 700 & now a SKB 505 both O/Us. Check out GunBroker.com for your specific model for current prices. All I know is SKB has been holding it's value. 80% of new if perfect condition but used to 50% of new if well used (early 80's). I would add +50% for match set of barrels.