What can the following sigs be worth?

I was working at midway airport and have several autographs from michael jordan signed on a orange work card. Atleast 10-15 of them. I also have a frank thomas sig, mike ditka, and bruce willis and oh yeah walter peyton from back in the day when I worked at the old soldier field. sigs are not on any sport equip or pics. just on whatever I had on me at the time.