Beautiful OJ's and a cool Cobb!
I've never found pre-war cards at a garage/tag sale, but I've come across some modern stuff that I flipped. I'm actually a tag sale junkie and go out just about every weekend on Long Island. I buy records, books, magazines, anything I can sell for a profit. I used to use the profts to buy cards, but now we're paying down debt, so all the money's going there.
I've shared this before, but I once found a rare autographed stock market book (Jesse Livermore) for $1.50 that I ended up consigning to Heritage Auctions. It sold for $6,500.
and just this past weekend, I made probably my most bizarre score. I bought a large seashell collection for $100. I know, it sounds silly, but it turns out that some rare shells sell for thousands of dollars and seashell collectors rival us in obsessiveness. I've listed about 60 so far on ebay and they're up over $400 already with several days left in the auctions. And I've got hundreds more. I'm hoping there's a $1,000 shell mixed in there somewhere.
It's amazing what people collect.