I dont mind saying. Its $6500.00. Its not an arbitrary number, I based it on what the last two high priced cb750s that sold on ebay just prior to mine. Both sold for over $7000.00. One was an all original '75...pretty clean from storage and lack of use, not restoration, and with after market muffler. The other was similar except it was one of the earlier bikes.
My bike is all OEM except for the chrome plating and one or two other performance mods (bearings in stem and swing arms, shocks, etc). Some do not like the chromed parts, but I have the original engine parts that were not chromed... that goes with the bike. In other words, a few hours can make the bike totally stock with a very low cost.
Anything less than that and I will continue to own it for the rest of my life.