Looks like a Stinger - but I don't think it's an '86. Have a look at the 86 Stingers in the gallery and you will notice that the side profile of the windshield is more curved starting in 1986. The 1983-1985 models had the more angular profiles. Best way to tell if it is a Stinger and what year is to get a HIN. Post it here and I will decode it for you.
I've heard you should check the transom & stringers well on these boats. Also, if you look in the side vents on the rear starboard/port side of the boats - you can see the plywood used when the boat was built and get an idea of the condition. I would definitely recommend a surveyor before purchase.
Han