Signed comic book? (Patreon)

Hi everyone!

Quick question: Are you guys interested in signed comic books (where I've done covers or interior art)? 

People request them from time to time, so I was thinking we can chose a winner every month for the signed comic book (Red Sonja, PathFinder, Dresden Files, X-Men, Spider-Man, America Chavez...)

We would need to do a new tier thou, because shipping is expensive, maybe 5€ (5,90$)?  

I'm open to ideas, so feel free to share them in the comments.

What you guys think?