At that price I would not question much unless you think it is stolen or the motor is blown, even then a 900 drops in easy enough to make it tempting.
I was going to ask WHY you want it, at that price buying to flip it is a option. Keep it as oem as possible as it looks to be all stock from the one photo, carby 750 are much more rare around here than 900's and for many riders the power difference means nothing.
Glad it is near you and not me because I do not need to own another supersport right now (wife just asked how many bikes do you own?) but at that price I would be adding it to the list before she makes me make one.
If shopping keep in mind.
750 never had stud problems
750 never had cracking frames in US
750 never had crank plug issues
750 made pretty much the same power as Ducati F1's and no one called them slow.
750 could have aluminum swingarm cracking issues like early 900sp and 900ss
750 came with ducati electronica rectifier that did some times fail.
What did you say the owners contact info was?