The hot dog vendor says that will be $7.50. The monkey hands the vendor a $10 bill, which the vendor puts in the cash drawer. After a moment the monk asks “what about my change?” The vendor bows reverently and responds “change must come from within.”
Maybe having the powerful magic items in the museum makes them a target, and the place gets attacked, and the players have to save it. As a reward and safeguard against future attacks, the museum researches a way to transfer the enchantment to a similar item? Sword for sword, gloves for gloves.