Cowabunda Dude!

I was hoping to get some feedback to whether this signed Teenage Mutant Ninja hat is worth anything or not?  I purchased it at a local garage sale.  The owner of the hat said he was 8 years when he had it signed.  I didn’t get any other details but kick myself for not getting more information.   The hat is dated on the rim of 1990 Mirage Studio All rights reserved.   I am not sure if it was signed by the actual cast members/actors or the puppeteers’ suit performers? My knowledge is very limited when it comes to the TMN movies and history.  The hat is signed by Michaelangelo, Leonardo, Rapheal, Donatello and April O’Neil .  I think this would be a nice additional to any-ones TMN collection.  The has does show signs of wear from use.  See photos for details.

Any Information on value would greatly be appreciated.  Thanks Brenda