Seems to me the fellow should be straight up with you.
since you're having thoughts about the $1000 tells me you're a straight up guy. I think you have given hum enough time.
Through no fault of my own, I once had to back out of a deal on a M farmall. I went to see him, and explained the situation, I did not want to tie him up.
The guy was straight up and gave me my money back, even though I did not ask. I gave him a few hundred back for his trouble. The man was dumbfounded. Now I can buy anything, anytime from him. just on my word if I dont have the cash.
Being straight up is the only way to go. he is being wrong avoiding you. I bet if he told you the scoop, you would understand, and work with him.
I'd put that tractor back up for sale if I were you. The man tied you up, and was disrespectful. whether or not you refunded the 1000 is your call. if it were me, I MIGHT offer him part, if he asked nicely.