My 2 cents...keep looking. $1,600 is WAY to much for a bike that is not currently running and leaks oil. How much oil and from where??? You will not know for sure and it could be the head gasket. "Tank needs restore", "cables need replacing", and the carbs probably need a rebuild too. And if you can not do all this yourself it will cost you about $75 / hour labor which is the going rate here. You can get a pretty decent CB750 for under that if you keep looking. I had that same bike for less than a year. My CB450 was brand new back in the day, but the vibration was very bad at highway speeds. So I traded it for a CB750. Do not get hung up on this bike...keep looking for a 750. You will be happy you did. Heck, by the time you get it ready to roll you will have over $2,000 in it. Way to much for a CB450. Even if you decide to buy it, do not give any cash until the owner has the title in hand.