Something my client learned the hard way. I recently got a listing from someone who had it FSBO for a few weeks before listing the house. Before he decided to list the house he choose to interview several agents. This went on for a couple of weeks and he pretty much spoke with the majority of real estate offices in our area.
Well, I was the chosen agent. We listed the house and I got an offer within one week. My seller never expected to sell the house this quickly and was out of town. I was doing the negotiating by phone (the wife on one state, the husband in the other), well the short of it was the buyer was from an agency the seller had interviewed. The buyers agent wasn't the actual agent the seller had talked to, but the agent KNEW everything the seller was doing, such as time frame to move, FSBO price, price of what they were purchasing and time of closing on that home. The buyers agent was doing a great job for their client and disclosed all they knew to the buyer. My seller never thought about all he had disclosed with the agents he interviewed. I warned him when I first talked to him to be careful in what he said to me in case he didn't decide in my favor. So the entire time we negotiated the buyer really had the upper hand, she knew a lot about this sellers transaction. This played a real factor in the counter offers with the price and timing of closing.
So my point is - to warn sellers to watch what they say when they interview agents who may try to list their house. I like to use this point when I make a lising presentation to my potential sellers. Sometimes trying to do a FSBO may cost you more in the long run than if you had just listed the house from the get go.