Correct wording in a mineral interest sale deed I'm asked to sign. Any advice?

I’m currently selling some mineral rights I own and after receiving the deed in the mail today, I’m wondering why it does not state anywhere what I’m selling the interest for. It doesn’t state the per net mineral acre price or the total sale price. When I asked the gentleman handling this sale why this was, he responded that the deed states: “for and in consideration of the sum of Ten and More Dollars, cash in hand paid and other good and valuable considerations” He said this is standard language for a mineral deed. Is he correct? Or should I ask for something that mentions the exact pricing etc? I’m new to this and have not sold any mineral interests before. Thank you for any help you can give.