The Prices in The Show Are Only from One U.S. State
Many people have speculated how “The Price Is Right” decides on the prices for the items. Prices change as the market fluctuates and items prices vary depending on the state or even the store they are from. In an attempt to keep things as fair as they can, the showrunners use only California prices.
However, not all of the people participating are from CA, but at least they can research the state’s prices beforehand. As for the stores the show relies on for their prices, no one can know. It’s only fair to keep the exact shops a secret to minimize cheating.