I don't think your price is out of line. The problem you're going to run into is that anyone with much knowledge of jet boats is going to pick it apart or just bypass it all together because of the Olds/Jacuzzi combo. The other problem is with the design of the hull, it has a deep entry which is great for a mild lake boat, pulling skiers, overall cruiser... but, isn't very good or safe for a faster performance boat. Unfortunately your combination is like putting a blower on a '76 LTD (kinda cool, but not for everyone).
So, IMO the boat would be more desirable to someone as a family runabout without the headers and tunnel ram.