Generally people offer to buy your mineral rights when they think they can make a tidy profit in the long run. It is usually to your benefit to keep your mineral rights and take the profit over the long haul if you can. If for some reason you need money now then you could consider selling some or all of your mineral rights. Without knowing the details of what the value of your mineral rights are, it is difficult to advise you. I have some leased mineral rights that are scheduled for drilling in the first part of next year and have had about ten offers to buy my mineral rights. Since I am in no dire straits for money, I plan to wait and see what happens if and when they drill. If and when they drill are based upon a number of factors, including the price of oil per barrel. The value of your mineral rights is also governed by the price of oil and what happens in the Middle East.