Bad choice of words on my part, you have good points and some things to consider to go with that. Way too many people get in over their heads on repairs, pulled the motor thinking I can fix it on the cheap, found out it needed machine work and got stopped, never got back to it. We have all seen it many times and yes it cold be cracked or a chunk missing that the seller isn't showing (81% rating definitely leaves questions). As far as the rest of the powertrain, couple hundred for the small parts kit and an afternoon, double that if you have to replace a gear or 2. The rear if it needs everything is $5-700, add $300 if the axles are bad, but doubtful.
It could be a good project for a builder, if you had to pay to have the work done, then it doesn't make sense and again the entry fee puts it at a tough sell...................but that is the asking price not the sold price.
Point is, IN MY OPINION, cars like this should be saved and preserved if at all possible. Doesn't a car like this add a lot to CRG?