I know of a very bad experience with that seller, FWIW. At any rate, I would tread carefully. Can I say that?
I'll add my voice to the chorus.
I actually bought my Jackal (my first Guzzi) from Dave when he was in the process of closing Sport Cycles.
He was not completely up front with a number of things.
I got the impression he was the Guzzi equivalent of a smarmy used car salesman who throws a Maaco paint job over rust and calls it "new".