I don't have any experience in selling. I will say that I have been in the market to purchase small interests of mineral rights in certain areas. Because of this, I have an account on EnergyNet. I have bid on a few properties and they have sold for more than I was willing to pay. I know there is a buyer’s fee there, but I don't know how what the sales commission fees are. There seems to be plenty of people willing to bid on the properties and the buyers are pre-qualified to a purchase amount limit. I had to provide contact info to my banker to verify my ability to pay.
Depending on the size of the properties and the interest in that area, I would check the local property records to see who has purchased rights. Then contact those as well as others that buy rights.
I agree with Mr. Kennedy that most are someone wanting to flip them for a quick profit. Doing your homework on the properties in your area should show you some clues as who the final purchasers are. Cut out the middleman if possible.
I have been observing sales in and activity for about a year or so. I’ve also been researching 60-70 years of documents on several hundred properties and what happened to other portions of the same properties I now manage for our family. Based on this, some points you may want to consider:
Take your time. The quicker you try to sell them, the more likely you are to leave money on the table.
Get all of your documentation in order. Documentation will vary by state. Many try to sell rights that lack clear documentation of the title history. In some cases the title is questionable. Deeds, Probate records, division orders, pay stubs, leases, and other documents help show clear title and amount owned.
Depending on the amount of money you are talking about, you might want to consult an attorney, consider using title research, and possibly an escrow (that you have verified as legit) service.
Research on the properties in the area may reveal some private mineral rights owners that own several properties in the area or even a percentage of the same property you have. One of these may be interested in acquiring more of an interest.
Compare offers from many sources. Let them know you are not in a hurry and will be contacting others to make an offer.
Do some research on activity in the area. Waiting may make the price go up (or down)
Beware of a potential buyer that tries to hurry you. Their offer may be a low-ball offer. They may know something about the area they don’t want you to know.
Good Luck!