This boat has been in ads out of Milwaukee and Madison for going on 2 years now. I contacted the person around the time when it was first posted and they were firm on the price then.
I think this is legitimate, but I also agree that this is a strange scenario. I don't like the idea of buying this, putting a 10-15k outboard on it and still looking for a boat that would resell for around 18-20k. Doesn't make sense to me.