A 2 pence bargain

This morning when I was in Oswestry I popped into a shop to buy some dental floss. When the assistant scanned it she said that it had been discontinued so was 2 pence.  As that was such a bargain I decided to buy a second one but that one was £1.49. The two packs were identical and everything that I could see about them was the same. I didn't bother with the second one.  What a bargain!