I think about selling games from time to time. As with most things they can become repetative and then not get played for a while, and you start thinking about using the money or space for other things. But the last time I did that about 5 years ago, I really kicked myself after letting some go, and found myself scrambling to get them back. A few of them I got the exact same machines back, others I had to find replacements, and a couple never came back. Unless you need the money or space, I suggest folding up a game that you are tired of and put it away somewhere. Then in a month or two you can open it back up and it's like a new toy again, or if you miss it sooner it's much easier to get it back when it's just put away and not gone.