In this case it is actually the labels that are more important. In order to mark 2 prices on a product you may want to use a 2 line label, this will allow you to show regular and sale prices on the same label. One line price labels are great for promotional pricing. Three line labels may be used to show two prices and some coding numbers on the price label.
If you are seeking a promotional labeler, look no further then the Monarch 1138 one line pricing gun. The Monarch 1138 promotional pricing gun prints 5 bold large digits. Monarch 1152 series pricing guns are great for promotions as well, they print jumbo serrated edged price labels.