This bill requires the federal Bureau of Prisons to cap commissary prices—goods inmates can purchase—at fair market value, meaning the average retail price charged to the general public in that state. The law affects all federal prison facilities and the inmates who buy supplies through prison commissaries. The Bureau of Prisons must use competitive bidding when contracting for commissary goods, cannot enter into contracts with revenue-sharing arrangements, and must review prices monthly to ensure compliance. The legislation requires annual reports to Congress listing all commissary items and prices at each facility, and mandates that the Comptroller General conduct yearly audits to verify the Bureau is following the pricing requirements. The bill takes effect upon enactment with no specific sunset date or additional funding authorization mentioned.