I was thinking the other day about packs that I've never seen - either in person at shows or for sale on eBay or other auctions. Here's my list. I'm interested in seeing yours!
21 Tattoos
Battle
Foldees (Topps - 1962)
Funny Monsters/You'll Die Laughing
Hot Rods (Topps 1965 black wrapper)
Love Initials
Mars Attack (does one really exist?)
Mod Generation Stickers
Mod Initial Stickers
Test packs - Rookies, Julia, Crazy TV etc
21 tattoos has a few different wrapper variations if I recall. I think there is a blue wrapper that I have never seen. I will have to check the guide book and see what all there is.