I didn’t want the items to end up with the somewhat evil collector anyways. As far as I know my players, they’ll side with the museum, even if it means less money – one of them is a librarian/protector of knowledge kinda cleric.
You bring up similar points to the other commenters regarding the safety of displaying originals. That’s definitely something I’ll argue with.
Right now I’m thinking they’ll transfer the magic to something my group can use, use the original (now inert) items for preservation/research and display illusory copies.
Thank you for taking the time to answer so thoroughly!