In some States there are laws that prohibit the making or the permitting of the making, of any materially false or misleading representation to the public as to the regular selling price of any product in any form whatever. The regular selling price is determined by using one of two tests: either a volume of the product was sold at that price or higher within a reasonable period of time (volume test); or the product was offered for sale in good faith for a substantial period of time at that price or a higher price (time test).

In the event that the regular price refers to the normal price of a brand name on the market, unless dealers have sold a substantial volume of the product at the represented regular price, it cannot be referenced as the regular price. Just ask "Show me the invoice at the regular price!"