I had a friend who had size 13 shoes. She could only buy her shoes at Payless. I had size 11 shoes for years until I lost weight and now I'm a 9-9.5. I was so happy once I got to size 10 because that meant that I could wear shoes in a regular store. I still have wide feet so it is still difficult to buy shoes but it is good.
Did the guy even check to see if he had 10s? I like buying shoes from Sports Authority because I can see what they have without having to ask.