You might be surprised at the modern collector value of unworn vintage Levis. Do they have rivets and an orange tag?
I too have wondered if they might have some slight value. I am sure they have the tags and rivets. It would take a while to find them. He might have just not wanted to dig through stuff for something he could not wear immediately.
When we were kids in the 50s and 60s, Mother would always get Wranglers for us. They were just as good and cheaper.