One of my neighbors went around to all the large parcel owners back in the 70 and 80s when times were hard and paid them an "Option Fee" usually $500 to for the first right to purchase the property at market value if the owner ever sells. Lots of the cash strapped local farmers gladly took the $500 since it didn't mean actually selling the land. These options are recorded with the deed at the court house. Twice now the properties were listed with realtors, sold to other parties, and when the title search was done it was discovered there was this option outstanding. The clever optioner ended up cutting out that other buyer, subdivided the farms, and ended up making $375,000 profit on one and $240,000 profit on another. Not bad for a few thousand dollar investment.