Please forgive my lack of knowlege on playing cards. I have a deck of Cards from Harrah's Reno/Lake Tahoe. The outside sticker says used in table play, etc. The inside flap says Lambert 3-29-73 pit 6. My question is, they aren't cancelled. was it common for casino's to sell used decks without cancelling them or is that just a more recent thing? Just curious I guess.