So the trend is having 78-88 A/G-bodies move up the $$ chain. Ok. Cool. I would imagine there's always those left in the dark that have no clue of any purchase/sold prices, and can still snag a cheap deal on a good car. Used to be that way with the older iron, too.
It's a double-edged sword, though. For those looking for a project, it's going to cost you more to get in the door. Not tremendously more, but more nonetheless. I look at this more as a supply and demand issue. I don't think the demand is spiking, I think the demand is still somewhat constant for these cars, maybe up a tick, but the amount of desirable cars available are dwindling by the year.
On the other side of the coin, if you DO have one to sell, the prices edging up is not a bad thing. It's still not at the 60s/early 70s iron prices, though.
So if you have a decent one to sell, particularly if it's low mile and rust free, you can always point to this sale to "prove" that the higher price you're asking is still in the ballpark.
Of course, if you don't want to pay, you won't get to play. And as usual, there will always be plenty of sour grapes to make sour wine...or was that "whine"?