I'd go to gunbroker.com and search the listed guns. Thatshould give a good average price. If the 30-30 was made before 1964 it could be worth a good bit. If the 11-48 is in good condotion that would be another higher priced gun. I just sold my Springfield 67F 20 gauge that was in decent shape for $100. I probably could have gotten a little more but it was for a guy I know grandson first shotgun. I just checked gunbroker, there is a 11-48 28gauge. The guy wants a starting bid of $1199 if I'm reading the add right?