Buyer failed to make payment as per sale agreement what can I do

there is a case in which there are 2 coowners having 50% share each in the property and one of them entered into agreement to sell with the buyer with the permission of the other cowner. The buyer paid the advance and rest were to be paid within 30 days.the other coowner before the expiry of 5 days of expiry of 30 days refused to sell his share.30 days expired and the buyer did not pay the whole amount.therefore a notice is served on the buyer to terminate the agreement to sell because he failed to make the balance payment.the advance is also forfieted. what is the legal recourse available