Weba 220 shotgun is currently worth an average price of $644. 74 new and $288. 66 used. The 12 month average price is $624. 78 new and $304. 91 used. The new value of a 220. Webthe average price for a savage arms model 220 slug gun is as follows: 415 login / register to view pricing. 300 login / register to view pricing. Weba 220a shotgun is currently worth an average price of $145. 86 used. The 12 month average price is $145. 86 used. The used value of…