<prompt> Human: My mother has been getting letters from an Oil and Gas company offering to pay her large sums of money for her mineral rights. She has a .005 interest and receives around 100 bucks a month. Sometimes less, sometimes more. They had been offering her 18,000 for her rights but recently they changed their offer to 36,000.It would take around 30 years to make that much at what her interest is currently garnering for her. Why the jump in offer? Do they know something we dont? Is this a good deal?- Thanks for your time guys!  <response>: They probably think there might be shale oil or gas under her land.Their offer is getting into enough money that it might be worth talking to a lawyer who specializes in mineral rights, and talking to other potential mineral rights buyers to see if some of them might bid more. 