1. New Jersey Administrative Code, N.J.A.C. 11:5-6.4(a): This regulation outlines the obligations of licensees and establishes that a seller's agent is bound by the fiduciary duties of "undivided loyalty, confidentiality, and accountability and to exercise reasonable skill, care and diligence" when acting on behalf of their principal. Disclosing the seller's lowest acceptable price without permission is a direct violation of the duties of loyalty and confidentiality.
2. Rutgers University, Center for Real Estate, "Real Estate Law" Course Materials: University-level real estate law courses emphasize the core fiduciary duties owed by an agent to a principal. The duty of confidentiality is consistently defined as the obligation to keep the principal's information private, specifically including their financial standing, motivations, and the minimum price they would accept for a property. (See course syllabi and materials covering Agency Law).
3. Arnold, A. (2015). Real Estate Principles and Practices. The University of Chicago Press. In discussions on Agency Law (Chapter 5, pp. 85-88), it is established that a seller's agent has a duty to keep confidential any information that could harm the client's bargaining position, with the seller's "bottom line" being a primary example of such information.