I would call the Bureau of Real Estate and file a complaint against the
agent who listed a property at $299,000 and told your agent that
they will look at offers above $375,000 http://www.dre.ca.gov/Consumers/FileComplaint.html
this is absolute nonsense and the agent should have a formal complaint filed against them. Let the board deal with this.
As a Realtor I have zero tolerance for crap like this.