Where to get used games online?

My sister-in-law loves playing video games. She usually buys used video games online so she doesn't have to pay full price for the games. Usually, the used games she bought are still working in good condition. Low price and top quality.

Asked her where she usually shop online for used video games, she told me to check out JJ Games. They offer free shipping free shipping on game and accessories orders over $25. There are two columns on the side that tells you their top seller items and the bargain bin (cheap stuff on clearance). Overall, the site is very easy to maneuver and user friendly.