I've avoided the amiibo scene for a damn long time now, basically ever since the SSB collection finished. However, I just scored a store kiosk, and I'm thinking I will change out the amiibo in the display once I get it properly mounted on the wall. My unit has Mario and Luigi from the Super Mario Series, Link and Pikachu from the SSB series, and an AC amiibo card in the middle. I'm thinking I will reload it with an 8-bit Mario in the middle, Mega Man, Pac-Man, Donkey Kong, and Samus. Nintendo applied a velcro strip to the bottom of the amiibo to ensure they stood upright within the display which should be fairly easy to replicate with a visit to Michael's or Hobby Lobby.
If you want to salvage those display Amiibo, you can get the velcro off with some heat. I got a SMB Bowser from our Nintendo rep a while back, and was able to clean it up with a hair dryer. Maybe not the Amiibo card though.