Help!! Advice is welcome here!!

Had an interesting conversation with a current seller today.  His home is vacant and has been on the market for approx. 90 days.  The listing is about to expire within 2 weeks.  I am currently thinking about not extending the listing.  It was an overpriced listing, we listed it at $275, my suggestion was $249 because that was what it comped out at.  He had the best home in the subdivision and it was going to be picked up quick.His words, not mine.  Avg. days on market is approx. 100 - 120 days.  The home has an Arizona Room which was done by the homeowner (no permits),no baseboards in the Arizona room,  wood flooring done by the homeowner, saloon style doors in the home office, no closet doors in the 2 of the bedrooms, a dog run that still had dog stuff (I'm not talking about toys).  I enlisted the help of a staging company because my seller was not listening to any recommendations that I was saying.  I paid for the stager to come in and give a consultation to the sellers.  As of today, they have not done anything that was suggested!!

I took this home on the Realtor tour, had plenty of feedback from other Realtors and a home inspector, all basically stating what I had already told him.  We had an offer and during the inspection period (he called the inspector, the pool inspector, and the air conditioning inspector all idiots!!) the deal fell through.  When I listed the home, I suggested that we purchase a home warranty, the seller wanted no part of it.  When this deal fell through and he realized that the air conditioning unit was 23 years old and might fall apart at any time, he agreed to purchase a home warranty on the home.  When I called him last week, I left the message that I wanted to extend the listing agreement an additional 3 months.  He finally called me back this morning and stated that he wasn't sure on what he wanted to do.  When we had the offer on his and I thought that it might fall apart, I realized that I did not want to work with him because in my opinion he is a bully.  I represented  him when he purchased his current home back in February and parts of that transaction left a nasty taste in my mouth. 

Advice???