Has anyone sold their mineral rights in Roger Mills County lately? Section 13-15N-21W. Had a landman contact the 4 of us wanting to know what’s a fair price. Also one sibling already signed and mail the papers back check is supposed to be in the mail few days ago hope he gets it. Afraid to send signed form back and give up all rights and then be mailed a check. Any advice would be appreciated. Thanks in advance.