I was contacted by a mineral company earlier this month. They want me to sell the rights to any minerals found on my property ( or 2000 feet below my property) during their mining. They offered me 10K up front or royalties throughout the entire life of the mine which is expected to be around 10 years. First off, does anyone have experience with this? Should I sell the rights or should I hold out for a better offer? Should I take the cash up front or the royalties? Any help is greatly appreciated.