Honesty is the best policy. I would not trust this person. Don't get your hopes up for his offer. Tell him you want to take your home off the market and see what happens. Contact me with any more questions.
Your instincts are most likely correct, sounds like he just wanted the listing. If he had a buyer then they would have come forward already. If you need a TOP realtor in AURORA , let me know. My Realtor has been a Broker/Owner for 33 years in AURORA and he certainly is a streight shooter.
First Capital Mortgage
My suggestion is simple. Fill out a listing agreement and stipulate your commission agreement, amount of the listing time period "and" make it specific to the buyers he claims he has. What I mean is, list the buyer's names on the listing contract. If he/she refuses, tell him/her that it will also protect them incase the buyer comes directly to you, the seller.