'78 engine is better than the '76, no idea why anyone would go for the '76 which is much harder to get parts for. I'll play the devils advocate here, the video of it starting first kick with mandatory reference to the stale fuel & all, is IMO totally staged & utter BS. Have a good look at the photo's, the simple fact that the shock shafts are painted black (not overspray), gives a fair indication of the type of "restoration" the bike's had. You'd want to have a good look at it in the flesh before bidding decent money, but then again, maybe I'm wrong & the cynic in me has taken control.
K