Kathryn,
After checking the area I find to the South, Southwest and Southeast a few miles EOG has been busy exploring and producing the Barnett Shale for oil and gas. I would counter offer for $350/ 1/4(25%)royalty/3year lease with definitely no deductions. As Buddy Cotten(Mineral Manager) says:NEGOTIATE...and get yourself a good lease. It might be wise to contact an Oil and Gas Attorney or Minerals Manager to help you with this lease as there may be more than 1 well drilled on this acreage.
Tomahawk Land Resources is a land brokerage company. They are not a company that drills and produces wells. http://www.tomahawklandresources.com/about.html They will probably lease your land and then sell your lease to EOG for a large profit.
This link is to Production Data on a well(337-35135)to the South of your A-579 approx. 3 miles:
GIS Map of Montague County A-579 and surrounding area:
CLICK ON MAP TO ENLARGE
ZOOMED OUT MAP SHOWING THE HORIZONTAL WELLS TO THE SOUTHWEST, SOUTH AND SOUTHEAST OF YOUR A-579
CLICK ON MAP TO ENLARGE
Clint Liles