To be honest, I play my pins very rarely when I’m home by myself. To me, it’s way more fun to play when you can share the games with others. This also keeps me from getting bored with the games too quickly.
I would also guess that a lot of us that can afford to buy games, especially NIB, are very busy at work earning money to buy more games.
I still don’t understand people that buy a new game, play it 50 times, and sell it, though.