I guess I am in the minority....I think the seller was wrong. Once you start trying to sell a ball, I feel it should not be used. And especially once someone agrees to purchase the ball, payment made or not. My reasoning is this: you are selling a ball under certain conditions, i.e the ball only has 25 games on it. Yet you continue to use it and when you do sell it, it may have 50 games on it. I doubt the seller changed his ad show this difference. You are not giving the buyer what he is paying for by doing this. And once the deal is agreed to, that is even worse. Even in baseball once a trade is agreed to the players are pulled from the game, same should go for a piece of equipment like a bowling ball. Once the trade is agreed to, that ball should be pulled and not thrown. JMHO.