Like your comment about suing.  I spoke with Al Sinclair - CP24 Hot Property, and asked him why agents have no responsibility when the buyers obviously overpaid, and now are having a hard time coming up with the money, since the house was appraised lower.  His reply was a) laughed, b) we have no responsibility written or implied for the value of the home, c) entirely on the shoulders of the buyer, and that he will 100% sue the buyer for his commission!!!  Summed up his advice "you pay us handsomely, for advice that has no consequences", unlike a doctor or a lawyer.  Buyer Beware, you are on your own.