The Chicago Department of Consumer Services recently completed an investigation involving 73 hardware and home and garden stores, more than 1/2 of them were found to be ripping off their customers. Charges range from not having enough of advertised sale items in stock to not having register prices match up with prices on the shelf. These investigations happen frequently, and often find the same types of violations everywhere, so it's always a good idea to make sure the price you think you're being charged is indeed the price that's printed on your receipt. If not raise a complaint at the store and feel free to give them a call: 312-744-9385.