I don't know, but save them.
When Taco Bell had the Batman collect and win game, I went their with my aunt coming back from the pool. I remember getting Bane and something else. I decided that since I never went to Taco Bell I should just throw them out. About a week later I start playing the game with my friends and to my extreme horror I watched as my friends and I got several of the other two pieces in the set and on that fatefull day weeks earlier I had thrown away the rare $20,000 piece, Bane.
I still sorta kick myself in the ass for that to this day.