CHICAGO – Potter & Potter Auctions‘ December 11 magic sale, featuring the Bob Rossi collection of materials related to Joseph Dunninger, delivered fine results from start to finish. When the hammer finally fell silent after a long day of energized bidding, 54 lots made $1,000-$2,499; 34 lots realized $2,500-$9,999; three lots sold for $10,000-$20,000; and one lot broke the six-figure mark.