Check out this 1978 Kawasaki KZ750 for sale in Belmont, California.
It looks really nice. According to the seller, he stripped the bike down to the frame and rebuilt it into a cafe racer. The seller did a nice job on it. I think $3,000 is a good price for this bike, if it’s as nice as it looks.
Or if you want your own KZ project to build yourself, here’s a 1981 KZ1100 for sale in New Hampshire for $950.