Yeah it's a big myth that they HAVE to sell it to you. I'd have bought as many as I could there and then and carried them out of the store, giving them time to deliver them they were bound to work out that they were priced wrong. You got greedy my friend and it didn't pay off. What did pay of for me is the time twirls were on offer at where i used to work, 4 for 1.20, when i scanned them through the forth one brought the total to zero for some reason. FREE TWIRLS!