If you get involved with a CBX, you will find quite a few idiosyncrasies. Parts prices have been driven into the stratosphere systematically by people who are in it for business. Even those who dismantle bikes tag a higher price on everything that says "CBX".
Some of them on ebay use shill bidders to drive prices up! Beware of the two from WI who are actually one and the same business!
Of course, the prices for complete bikes are going up and so are parts, as a result.
You would think that the model that was produced in the lowest number would command the highest price among collectors. Not so.
Everybody wants a 79. Because they think the (nominally) 5 hp difference make the bike sooooo much faster and more desirable.
In stock form all other models handle better and have improvements the 79 does not have.
I should not talk, I have three CBXes myself...