Old-Dutch If he actually made a legitimate offer than he would have to have demonstrated that the funds were available for the purchase and entered into a sales agreement. My understanding is that you make x% of the purchase price available upfront to prevent this exact type of situation from happening.
So either a. He is really going to try to recoup his potential loss via a legal battle over the bot stuff, or b. he never actually made a legitimate offer in the first place and this was all a complete stunt.