Current mineral lease coming to an end (laramie co, wy)

Laramie Co, WY Township 14N; Range 64. We have been contacted by Silo Oil and Gas about a top lease. What is a good offer for this area? How do you know if a lease is good or bad?

I am in 13 63, and the current lease's are going for 18 3/4 royalty and bonus's from $500-over $1000/acre. Just depends on your location. Best find a good landman or attorney to review your lease offer and help with the negotiations. These rates are from last year, so they may be less now since oil dropped in value.