it sounds like your store is like the one in the town where i grew up.
they had an expired box of tmx 100 100sheets when i say expired, i mean
the box was covered with dust, and the date on the box was 10 years before.
the price was 100$. i asked for a discount seeing it was 10years + old and they refused ..
i went to b/h and bought a new box for 67$ ..
this is the same store that toyo told me were dealers of their gear, and the manager
didn't know toyo was a camera company ...