Pokemon varies depending on the deck, but it can be in the range of 50,000 to 100,000 won.
Yu-Gi-Oh, it costs about 100,000 won to 200,000 won to match the deck.
Magic the Gathering starts at 300,000 won or 400,000 won if you do it right, but I think that Yu-Gi-Oh is a cheap card game.
Did you lose your sense of economy because you played a lot of games?