Oldzee

Hey fellas, I'm aware this is an Olds site, but don't know where else to turn. I have a lead on a supposedly immaculate Caddy Coupe Deville with only 18,000 original miles that is still owned by the original owner. It's black on black with the Continental kit on the back. I'm going to see it tomorrow. I'm aware of the HT4100 engine problems and how this greatly reduces this car's value. Any ideas of what this might sell for? May be one heck of an opportunity for someone to snag a deal because if I buy it, I won't keep it. I'd be able to pass a deal on to somebody else. Any info is greatly appreciated.
Scott in CT