Seems to me the price on the '67 is based on family sentiment, but in any case is well above the market, and the mods are hardly a boost.
I think the '69 car came out of a warehouse auction a while back - several Mopars stashed away - and not surprisingly was bought for a lot less than the CL price.
Its price isn't all that nuts compared to the other '68-'69 Barracuda 340-383 FBs I've seen, if its originality is equivalent to a nice-driver restoration.
There are a couple nice ones on Ebay, asking prices in the 29 - 35K range that appeal to me.