You can contest this very easily as I have done several times.

These knuckleheads want the homes till they see the report and then they back out thinking they owe no one a dime.

If you have a contract signed, a copy of the report, possibly some documentation that the home was for sale or on the market is what you'll need. If he worked with an agent, you can contact them and explain your case and they may help you out by showing documents that they represented him and have on file his documents of him backing out on the deal.

You call this "Theft of Services", and you should let him know in the form of a certified letter. If you explain this and show enough proof to the credit card company they will reimburse your account as they did for him. THEY NEED PROOF.

Good luck!

Rick