Lynn,
After checking your minerals area of Rusk County I can see why Southwest is interested in buying your minerals.
Adjoining your property to the south is A-248 with 2 Horizontals oil wells that were drilled in (Sept 2004-API # 401-33370) and (October 2005-API # 401 33631). Apparently they like what they see. And to the west of your minerals I see several oil wells and plugged oil wells. The target formation is the Pettit for these Horizontal wells.
Link to drilling permit for well # 401-33370:
You're in a good area for some oil production in the future. No, don't sell. Just my opinion.
GIS Map of Rusk County A-809 and surrounding area;
Clint Liles