I had a buyer client I'd worked with for a while, who suddenly decided to look in a different area. We had gotten along famously, they thanked me profusely for my help and knowledge, so I was sad to see them go, but, the new area was far enough away from my area of expertise, that I understood their desire to use an agent with local knowledge. No hard feelings.
Several weeks later, they decided to return their search to a community in my area, but they didn't let me know. Instead, they started attending open houses... and surprise of all surprises, they met some nice agents at those open houses who they had show them some additional local properties. All-in-all, at one point they had three agents working with them, before they came back to me.
When they returned to me, they told me about their experiences, and that while the other agents they'd met at Open Houses were nice, they didn't have the base of knowledge, the expertise that I'd demonstrated to them... and they wanted to come back to me. We looked at some additional properties that had come on the market since they'd left for "areas unknown" and we ended up finding a property, and wrote an accepted offer.
Now, Before y'all get started with the "You should have them sign an Exclusive Buyer's Agreement (EBA)"... I don't use them, I don't believe in them... so don't get me wound up. In fact one of the agents they'd met wanted them to sign her EBA... and they didn't want to... when she insisted... that's when they left her, and returned to me.
One of the agents they really liked, not because she was professional, not because she was knowledgeable, not because she was experienced or anything else... but because each time they met with her (including at the open house)... she gave them a little goody-bag filled with candy, soaps, lotions & candles, and they enjoyed getting that little "gift" each time they met. But they learned rather quickly, that the little bag of goodies came at a real cost, since the agent didn't have any knowledge of local market.
Am I going to start handing out goody-bags to my potential buyers?? No, I'm just going to continue to offer truly excellent service, along with my expertise and market knowledge, and let the soaps & candies fall where they may.