Jesse
I am not going to try to even act like I got a hint of understanding on Mineral rights, but will give you some quick math on what I see on this offer...
Their offer is $45000
lets say that the well lasts 10 years which equals out to a offer of 375 a month or about $12.50 a day... that kind of makes it a little more down to earth $$$ on it... I just got out of a lease that was signed in 1944 and was drilled in 1949 and has produced since then.... aprox 63 years... at roughly last 10 years at $1200 a year with no work or recomplete...
63 x $1200 = $75,600
or 10 x$1200 = $12,000
I will bet with them offering to buy and a recent recomplete order in place there is some decent production coming from the formation you well is in at this time...
Like Dogbert said, Take a deep breath read up on here search the forum there is a ton of great info on here that can help you out...
If you don't need the $45000 for life and death situation sit down do some research, I bet the more you drag your feet the higher $$$ offers will be...
XTO and other compainies don't throw money down a hole for no reason or to loose money they know what and how much is there...
Robbie