1988 Dakota....flared rear fenders....?

I am about to purchase this 1988 Dakota 4x4. I have never seen a Dakota with this style of rear fenders. I have yet to see the truck in person as it is a 2hr drive. Planning on a road trip this Friday to check it out. The guy says the fenders are stock and they look stock in the photos but I can not find any info online. Can anyone tell me anything about this?

Much appreciated.