Based on the pac-man thread from the other day (or was it earlier today, it's hard to remember in internet time), people are willing to buy the same game over and over. Hell, I bought two different Namco Museums for the Gamecube even though the only main difference, apart from a couple games, were the interfaces (the 50th anniv. version had the "game room" look). There are people out there who will buy the same game twice, if only to complete a certain virtual arcade collection.