When my husband and I go shopping, especially if we are shopping for appliances, electronics, etc., we utilize a free barcode scanner app on our phones. This allows us to compare the store price to the overall prices at other retailers. This is especially helpful while shopping at "discount" stores such as Tuesday Morning, TJ Maxx, Burlington Coat Factory, etc. to see if we are actually getting a good deal.
Search the free apps for "barcode scanner", and a variety of options pop up. There are also scanners you pay for, but why would you want to?