I remember those cards very well. Since stores around Oklahoma City never seemed to have gotten series 3 through 6, when I found that Wonder Bread had some Wackys that I didn't, I had to have them. So, as my mother shopped through the rest of the store, I would peek through every Wonder Bread on the shelf and pick the ones with cards I didn't have. (I'm sure the other Wonder Bread customers were happy about squished bread on the shelves.) My mother wasn't too pleased, especially since that was not the regular brand that we usually bought, but I put on my cutest kid face and begged her and promised I'd eat the bread. She relented and bought them for me, but she froze them so they'd keep. I ate Wonder Bread for the next year!
I do remember that most of them had moisture stains from the bread. I probably have them tucked away somewhere, but not with the rest of my collection.