MY COMMENTARY:
To me, the various ways that products are dated here in the U.S. is so confusing ("best buy," "purchase by," etc.) that making sense of it all would be compelling in and of itself. In a health food store a few weeks ago, I called out to the manager that an entire wall of products had expired. The cashier's face lit up and later, she told me that she hated to admit it but she was glad...all of it was going home with her.
I definitely see a market; just a matter of getting the word out to the right people.