If you signed some document several years ago canceling the escrow for the purchase of the property that you are writing about with a full release to the seller, then most likely you have no recourse against the seller for specific performance to purchase this property under the contract that the seller signed.If you did not sign a full release concerning this property with respect to any escrow cancellation, then you still might have some basis for specifically enforcing the written contract to buy the property that you entered into several years ago. I suggest that you consult with a real estate attorney further about the situation you are writing about and have him or her review all paperwork concerning this property.