A somewhat more pressing problem, IMO, is that everyone selling on Ebay seems to think their average condition CB750 with 25,000 miles on the clock is worth four or five grand. I have an entire page full of red "You did not win this item, reserve not met" on MyEbay.
Maybe they've all seen what a sandcast bike goes for and don't know the difference.
Or heck, maybe I've been away from SOHC's for too many years and that's what these bikes are worth now.
Frustrating, at any rate.