I couldn't find the appropriate place to put this so if a moderator reads then and has a better place to put it, please do. I just went to walgreens and I noticed 8 decks of luxor casino playing cards for 99 cents per deck. I decided to buy them and when I opened them all they were marked with a sharpie on the top left corner of the card. Is this a standard procedure for the casino to mark cards that were already used. It seemed odd because the cards were in perfect order, just like if you were to buy a deck of Bicycle cards, they were in the correct order.