Am I Being Unreasonable? Original Owner Wants Car Back

It's your car. Keep it if you enjoy it. Lesson learned for me. I bought a car off of a buddy that was a very good deal. He bugged me and said he wanted the car back and was going to restore it for sure. So, I sold it back to him for what I paid for it with the agreement I had first right of refusal to buy back again. He turned around and traded it for another car that he didn't even want and is selling it for more. I even tried to buy it back from the new owner, but he is just a flipper and is asking too much for it now.