Thank you very much for your post.
The Realtor that approached is in violation of The Code of Ethics
REALTORSÂ® shall not engage in any practice or take any action
inconsistent with exclusive representation or exclusive brokerage
relationship agreements that other REALTORSÂ® have with clients.
Article 16 is intended to recognize as unethical two basic types of
First, telephone or personal solicitations of property owners who
have been identified by a real estate sign, multiple listing
compilation, or other information service as having exclusively
listed their property with another REALTORÂ®;
I would file a complaint with the Orange County Association of Realtors
25552 La Paz Rd ,Laguna Hills, CA 92653 (949) 586-6800
As you are listed with a broker my only additional comment is that it appears you may not have an accurate picture of the real estate market. Review this link.
I do not work in your area, however in general I know that Orange County is a strong buyer's market, Market tend to be "pockety", so you particular neighborhood might be different, but I doubt it.
Don't confuse the commission fee you pay with the amount of money you net at the close of the transaction. If the predictions are correct, and they apply to your situation, we are looking at a strong buyer's market for the next two years, at least. Bear in mind that a buyer's market is normal for the United States. The strong seller's market we have seen was NOT normal.
So it comes down to the liklihood that your home, right now, is at it's peak market value for the next two or three years. Think about why are you moving, your timing, and what the consequences are if you are either unable to sell your home for your net figure.
In most cases a Realtor's ability to negotiate their fee is a good indicator of their ability to negotiate for your sale price. You're worried about six percent. A good Realtor is worried about preserving the other 94%.
Best of luck to you.