Gerrit: While browsing in a record store I noticed that one copy of a recording I wanted had mistakenly been priced at a quarter of the list price  When I finally reached the cashier I was told that the price had been mismarked and I would have to pay the full list price  Since I had wasted an hour standing in line, the retailer was morally obligated to sell me the recording at the lower price  Saskia: I disagree
You knew that a mistake had been made, and you were simply trying to take advantage of that mistake
The price displayed on an item in a retail store morally constitutes an irrevocable offer to sell the item at that price.