My son was purchasing a home through a real estate agent. The sale was almost complete and the mortgage had been approved. At the last minute my son received a call that the home went under foreclosure. The seller filed bankruptcy. The seller and his agent did not disclose the hidden agenda. My son retracted the sale and asked the seller for refund of all expenses paid up front (down payment etc.). The seller is refusing to refund all purchase expense. Does my son have a case?