Oregon Revised Statutes Trade Regulations and Practices § 646.883

(1) The seller clearly and conspicuously identifies in the advertisement the origin of the price that the seller is comparing to the seller's current price. The origin of the price that the seller is comparing to the seller's current price includes but is not limited to the seller's former selling price, a manufacturer's list price or a competitor's price for the same real estate, goods or services.

(2) The price comparison is in compliance with ORS 646.608 (1)(j) and the rules adopted under ORS 646.608 (4) and compliance is established based on facts provable by the seller.