Ancient Ears and their value

[wrw0010]

This is slightly off topic but I don't know where else to ask. When I was a child I went to the MK 10th anniversary. My uncle worked for Disney at the time and he got a pair of silver ears with a tenth anniversary patch on the front. There were only a couple hundred of these made and everyone who had a pair got to ride in the parade. I just have them sitting on a bookshelf but was booking stuff for insurance and thought I might need to find out if they are worth anything. Anyone know how to value these? Are they even worth anything (other than the sentimental value)?