After appraising the metal ball, he put it on the table. NotWearingPants carried the metal ball carefully in his arms as though he was protecting a treasure. He did not mind the fact that the ball had been licked by the shopkeeper.
"This item is actually an Ancient Ruin's key. I didn't expect us to trigger the preparatory mission for our future Instance Dungeon conquest," NotWearingPants muttered to Arthur. "I must add this point in tonight's Strategy Guide."
The shopkeeper ignored their nonsensical ramblings and said, "Though it's an Ancient Ruin's key, it's not clear what ruin it is for, so I can't give you a high price. I'm unable to confirm its use, so I can only give you 5,000 Magic Stones for it!"
Sherlock beckoned Arthur and NotWearingPants to leave. If he could find the location of the Ancient Ruin, the key would fetch 50,000 Magic Stones. If he sold at 5,000 Magic Stones, it would be a major loss for him.