I posted here a few days ago: pandce.proboards.com/index.cgi?board=mm&action=display&thread=2934 Yesterday I emailed the owner (the realtor had merely forwarded me the tax statements from the owner, so not only do I have his email address, but I have his SSN) The owner wrote back to me today and said he never told the realtor that he wouldn't pay my agent and the realtor lied to me. Interesting. I sent a formal notarized complaint of to the state real estate commission.
He does not seem like someone I would want to work with! I am a realtor and in FL if he has a commission listed on the mls (ie: he offers 3% to the buyers agent) he cannot change that when someone makes an offer. That is a legal contract when he puts it on the mls. Also the seller has likely agreed to pay 6% and he can't just keep all that if the seller doesn't agree.
However, you should not have asked him to show your parents the house if you were not planning on using him as your agent. He had to take time away from another client/contract/family and basically just worked for free. You should have gotten the agent who you wanted to work with at that point. In my state if he can prove that he was the cause you want to make an offer, he can sue for the other half of the commission since he did take you into the house. I actually just heard of that happening recently, but it was the buyers agent who showed them the property and then the buyers decided to work directly with the listing agent. The buyers agent sued and won her part of the commission.
He won't sue you and is acting like a total ass and harassing you. He also should have educated you on how the system works since you obviously were not aware. He should have asked you upfront if you had an agent and then you would have explained to him that you were planning on getting one so he could have directed you to that agent to show you the property.
Real estate tax info is public, but SSNs are not. If you look up property tax info it won't show that. I would fire him for not redacting the SSNs when he sent that to you. I think you should let the seller know he did that if you haven't already.