Current price for Tarrant Co. Minerals?

Hello. My mother owns some minerals in A-1426 in Tarrant County. It's not much, but she is considering selling to raise some cash (isn't that why anyone sells??!!). I'm wondering if anyone can give me some ranges for market value for the sale of minerals in this area? Also, what about just leasing them? Thanks in advance.

Patrick

RRC data shows several wells in that Abstract already. Was your mother never approached?