[not] for sale

I get these letters in the mail: 


I would like to purchase all of your interest in the above referenced properties (meaning they want to buy me out of the earnings I get from Oil & Gas Lease Royalties). The letter goes on about the terms and when it is effective and all this legal language.  Some of them even thank me for contacting them when I never once did a thing remotely like that.


However, ever time I get one, it goes straight to the shredder.  Why?   Because they are not for sale.  Because I didn't seek a buyer.  Because I want the funds.  Because the royalties pay my property taxes (at least on two of the three pieces).  Because the amount you wish to buy me out isn't but like more than 2 years revenue.  You seriously think I am that ignorant???  Even if the Oil & Gas Company seems to send me paperwork that must be notarized or witnessed every two months, I truly, am not selling.  Give it up.  All of you.  You are wasting your time.


Would you sell your Oil & Gas Royalties?  If so, how much would it have to be worth for you to consider it?