Determining cost basis

Oklahoma Mineral Rights Major County, OK
1

I inherited some oil rights in Major County in 1982. What is best (and cheapest) way to determine cost basis?

2

This has been addressed before on the forum:

http://www.mineralrightsforum.com/forum/topics/capital-gain-cost-basis-on-sale-of-mineral-rights-royalty-2?id=4401368%3ATopic%3A409059&page=1#comments

The short version is you'll need to find a mineral rights appraiser to draft you a report.