Quoted from SantaEatsCheese:4. Never make an impulse pinball decision on buying or selling a pin.
I agree! I've done it... went to look at one game and it was a load, so I took something else home with me. It never worked out.
However, I like "almost impulse" buying. I do that on "can't miss" games. For instance, a game that I wasn't really interested in, but is offered to me at a great price. I am sure I'll be able to get most of my money back if I don't like it. Sometimes I play it for a couple months, then ship it out the door to get my money back. Other times, the game is much better than I knew, and it just sticks around. Quite a few of my long term games came in like that.