I don't know about old/expired film, but I can mention something odd I saw last week.
Michaels Cameras in Melbourne was unloading two large cardboard boxes of E100VS film into their shop floor fridge last Wednesday. I was examining a Holga and a Diana on the shelf next to the fridge and observed the guy cutting open the box. During lunch, I felt that it was odd to be seeing a film that I thought was discontinued (correct me if I'm wrong on this). These were two large boxes, all pro-packs being loaded in. It's either old/expired or new/uncirculated. I'll have a closer look when I return this week.