In the past year I bought four 1970 Kelloggs packs. One has Rod Carew on the top, so I didn't open it. The other three had more common players on top, so I opened them. The cards had a bit of a curl to them, but none were cracked.
More recently I've decided on a new project. It is now my goal to collect an unopened pack for each player in the set - yes, 75 different unopened packs. I guess there is no way to find two different packs for the Bob Gibson variations and it is likely that all Gibsons assembled into packs are from the same print run.
I didn't see any of these packs at the National during the last few years. I will look again next year.