So this just sold on ebay:
http://www.ebay.com/itm/261649619676?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

$21K for a 1967 convertible with a 400ci
But a 1968 convertible with a 400ci engine (highlighted on this site) sold the other month for $43!
wow. twice as much. both were in the blue color family.

Sure things like condition and of course marketing with quality photos, but still. That is huge.
hmmmm....I am learning a bunch during my search...I personally have always liked the 68.