I don't think he made a mistake, either. He's just looking for an excuse to back out of the deal.
This is the reason I don't do business with people in certain countries (Austria, Czech Republic, and a few others) anymore -- culturally they're trained to rarely say "no" even when it's something they don't want or don't want to do. So when it finally comes to performing a particular task or fulfilling an obligation or making a payment they go silent, disappear, or make some excuse. They'll drag you through six months of negotiations even though they had no intention of completing the deal, just because their culture trained them to avoid honesty and saying "no."