An unexplainable coincidence, A Library, A Customer & the Sandak

This morning after hauling in to the store a recent library acquired, a customer enters our store. Briefing him on the recent acquisition, I mention offhand that the books came from a fellow who lived for a time in Portland. Turns out the customer had lived in Portland decades ago as well. Not only did the customer know the now deceased owner of the books, the man was his Sandak!
The families were both very good friends and a few phone calls later the widow and the customer were both on the line together reminiscing life in Portland 30 years ago.
Assuming there are 15,000,000 Jews in the world, the chance of walking in to a bookstore who just acquired your Sandak's library is somewhere like 1 in 15 million. Just Fabulous to me!