I occasionally go back through my main vintage PCs and see if there's anything I can upgrade for a reasonable price. I'm perfectly happy with what I already have but if I can really up the eye-appeal without destroying my wallet I jump at the opportunity. I was recently able to upgrade one such Roy Campanella card for about a blaster and a half.
I quite dig the 1954 New York Journal American set and the first Roy I landed was missing a chunk. I knew I'd definitely upgrade that eventually and recently a really nice PSA 3 example came up for auction.