1980 GMC High Sierra k15 51,000 original miles!

I am looking to sell my 1980 GMC k15 High Sierra. This pickup is all original down to the floor mats. It has 51k original miles! The original paint shows very well. No rust anywhere. It was sold new in Garrison North Dakota. Only thing that is not original on this pickup is the rally wheels and I do the have original steel wheels and full wheel covers. (the pics in the shop it has 7in rallys now has 8s as shown in outside pics). The original 350 engine starts and runs great. Brand new exhaust along with the tires. The pickup is loaded with working air condition, cruise, power windows and locks. Drives very well. Also both tanks work. Everything works as it should. I'm sure I'm missing something so any questions please call me at 701-263-5665. I really don't want to sell this pickup. I just don't drive it enough.