> "The Pennsylvania Quakers" "honest price" was institutionalized in 1874 by John Wanamaker, when he opened his eponymous department store in Philadelphia. A renowned innovator of the highest integrity, Wanamaker was the first retailer to offer money-back guarantees. He also invented the price tag: "A devout Christian, he believed that if everyone was equal before God, then everyone should be equal before price." Before Wanamaker's, every purchase was open to a haggle."
If you have a link to some reading material about this, I'd love to check it out.