Haven't been into baseball cards since I was a kid, but I do have a small collection of bats...really just stuff that interests me rather than things that are likely to appreciate in value.
Phil Plantier personal model (unused)
Eric Anthony game bat (his number written on the knob, very light use)
1990 Wrigley Field All Star Game commemorative bat
Michael Jordan store bat
2X Mark McGwire store bats, blems (unusual design)
Harmon Killebrew store bat (looks like his personal model)
Stan The Man store softball bat (Musial's own bat company)
Winner Hornsby style store bat (distinctive design supposedly pioneered by Rogers)
Ducky Medwick store bat (surely not authorized as Joe passionately hated that nickname)
As well as various and sundry other novelties.
The Anthony bat was actually cheaper than store bats go for now and could still be used...he was a guy who had an undistinguished career, but he once lined a shot off the back wall of the Astrodome that may have been the hardest hit ball I ever saw in person (about 10 feet foul, unfortunately for Eric). Plantier was a guy I tracked through the minors and he looked like a potential superstar for the Red Sox, but also ended up having a modest career (Bill James was very high on him if you are into baseball analytics). The Anthony bat feels like a nice weight to me, but the Plantier bat is ungodly heavy...maybe that's why he didn't use it, or maybe he was a throwback to the Ruth era of 40-50 ounce bats.
The one bad thing about bats is that they take a ton of space! Haven't bought one in maybe 5 years. My interest in baseball has also waned as I have gotten older, my daughter is a college fastpitch softball player and I honestly enjoy watching that sport more now. I could probably fashion a closet out of her worn out composite bats that we still have laying around...