Glenn Herdling Autograph Worth?

Hi!

I just found these 2 cards and this issue of What if... in my collection of goodies and they are all autographed by Glenn Herdling...I totally forgot he came to my class in Elementary school and spoke to us!

I am in need of some rent $$ and might need to sell these...what would you think they are worth?

Thank you !!!!

15 box.