Need advice on selling mineral rights

I personally own a out 200 acres of mineral rights in multiple different townships and ranges in Pittsburg County Oklahoma and Latimer County Oklahoma. I’ve considered selling all I own but not sure what the value is. In total I hold fractional interest in over 30 different sections, mostly township 7 North Range 16 East in Pittsburg County Oklahoma as well as township 4 North Range 15 East and 8 North Range 16 East and 6 North Range 17 East. Any suggestions would be appreciated.