Lost small collection of vintage 1970s comic books including rare Spider-Man and X-Men issues in a black and white checkered bag.

I lost a small collection of vintage comic books from the 1970s while visiting a friend in Auburn last weekend. They were in a black and white checkered bag and included some rare issues of 'Spider-Man' and 'X-Men' that I have treasured for years. If anyone finds them, I'll be incredibly grateful!