I tend to have GameFly games out for a while. I wondered to myself - is this really worth it? If I just bought used games, would I not only spend about the same amount of money but also get to keep the games?
Turns out GameFly lets you look at your rental history. So I did. Turns out, for games I actually finish, I tend to have them out 4-5 weeks. So that's a cost of $16-$20 or so in Gamefly time. These are games that are still fairly recent releases, that I could buy for around $35.