I agree with selling the bikes with the original spoked wheels. My CB550 with stock pipes, stock engine, and custom paint sold for 3900 this year on eBay. I don't think the 'cafe' market has bust, but it is slowing down for the 750's. Two years ago, the 750s were sought after. Now, it seems the 550s are more the flavor. That being said, Los Angeles is still a hot market for modded bikes with prices between 3500 to 6000 for custom bikes. I believe unmolested, titled examples of CBs will become more sought after and are going up in price due to it being hard to find one without the frame chopped or blacked out with spray paint.
If I was in the market, I would but an original like yours and leave it alone. I wish I would have kept my old 75 CB550 with the original exhaust in excellent shape-those are even harder to find.