No claim or representation shall be made by any means which has the capacity or tendency or effect of deceiving buyers or prospective buyers as to the value or the past, present, common or usual price of a product, or as to any reduction in price of a product, or any saving relating to a product. Savings or value claims utilized in connection with terms such as "originally," "formerly," "regularly," "usually," "comparable value," "list price" or other like terms, expressions or representations must be based on facts provable by the claimant or advertiser.
940 CMR, § 3.04