Deborah I suggest you go to the Howard County General Discussion and post the question of what minerals are leasing for in the area of your parents minerals. Give the complete legal description…
Section 15/Block 25/A-25
And possibly someone will give you a ballpark figure of what they are leasing for in that area.
https://www.mineralrightsforum.com/t/howard-county-tx-general-discussion/28078
Clint Liles