uh oh, now what

Thanks for all the suggestions. Years ago I wanted to be a lawn tractor and the guy wouldnt accept cash because he had been burnt with counterfeit $100's in a previous deal. Since then I have been leary of this. Yes this will be a big ticket sale if this guy is real so I have to be careful. The title wont leave my possession until the money is in my bank for sure. I like the bank holding the title until funds are secured. I will talk to them about that and also a new account. Cash is good but I was already told that would be difficult for him to get that much cash. I just want to be very careful.
Thanks for all the suggestions.
Rod