Did you buy them from Kruk Cards? I bought one of their 5000 count error boxes. It was advertised to have 82 Topps wrongbacks. I was working on putting the 82 WB set together at the time. No 82 WBs and they told me too bad when I messaged them. They did say I could return it on my dime but I declined.
On a side note the commons actually sell the best. The star players are easy to find. There are other weirdos like me who put blank back/front sets together and the commons are the hard to find cards.
Out the backdoor was NOT the only way to get these cards. Many ended up in packs. The card makers also sold them directly to certain dealers/collectors. I know this as a fact because I personally bought cards directly from one of them. I also bought/sold/traded with a few others that done the same back in the 80s/90s.
Welcome to the forum.
