What does your original contract state?
Oh that's great go ahead and sell your property! Call the agent first though because the buyer was found while listed with your hard working agent. Your agent can take care of all the paperwork for you and finish it all up for you!
You will want to look at the listing agreement you signed with your Realtor and what it indicates regarding this matter. This is written out in our contracts here in Florida. If the listing agent you were working with did the job you requested, then you would be best served to recontact that agent and reinitiate the contract, assuming that buyer is still around and interested in your property. The fact that you had a contract would indicate that your Realtor did his/her job to your satisfaction, and has taken the steps to earn their commission. I am sure you recognize that we as Realtors work on a straight commission basis and when a deal does not close, we are not paid.
Good luck with the sale of your home, as well as your heath.
RE/MAX Advance Realty