Lubbock County mineral rights

Anyone hear of Black Diamond? They are offering us a price on our mineral rights and wanted to know what's going on in the area as far as oil and gas drilling. Not ready to take the first offer. I received advice from a friend/Landman who has paid up to $2500 per acre for large tracts of land in West Texas, standard 3 year lease, 25% royalty and 2 year option. Sounds like some are being offered $500 -850 per acre in this area for similar tracts of land in the 160 acre range. Any truth to this? Trying to do my homework. Check Texas Railroad Commission to see who's drilling or what kind of activity is happening. It's seems all "Greek" to me at this point. Thanks for any advice.