Something is up with this story...got the car a month ago and selling already? You would also think if he mentions the odometer counting fast, he would mention the speedometer being pinned to 85 all the time as well.
Not saying something this pretty isn't worth checking out if it's what you're looking for, but could be title problems or something like that.
I have seen that car on NH CL a few times in the past. It was actually a raffle prize for a local Concord NH church about 5 years ago. Last year it was listed for $3,500 CL.