A Story That I Heard

I do not if it is true but I see little references to it occasionally.   The claim is that offering goods at a particular price available to all buyers was originally a Quaker notion based on treating all equally.   It sounds like something Quakers would adopt as a policy.  This article about Macy's Quaker roots references it.

I ask because colonial advertising is remarkably basful about prices of goods for sale.  I would like to find out sale price of pistols in the Framing era.