Lunker, like everyone else is saying, the motor is probably scrap and should not be factored into the price. Judging by the amount of paint missing where the cowl sits, the engine has been opened up one too many times for various problems and likely run with the cover off more than once!
The boat is extremely heavy and could not be handled by one person and definitely will not ride well in any kind of swell. It is also too big for the trailer and a mis-match.
I would keep looking, otherwise you are going to end up with a money pit.
Remember that when you are out on the water, particularly the Great Lakes, you want a reliable motor above all else. That does not look anything like a reliable motor to me.