Its probably a bit late for this but i found it and thought maybe it would be useful when buying a car. Very basic stuff but you can always become too excited when buying a car and forget about asking the right questions and looking for the right problems. No i dont know anything about the car your talking about but he has no Engine pictures and no interior pictures. He also does not say whats actually wrong with the car which could mean hes hiding something. I wouldnt buy another car unless i was 100% sure it was good. I would get him to get a RWC and find out whats exactly wrong.
Hope it helps in some way and i wish your friend good luck!
Riggsy