Mario Tennis Open is currently on sale for $17.99 over at
GameFly.com. GameFly used games generally have their boxes and manuals stored away before the games are shipped for rentals, which means their used games are generally in very, very good condition. The Club Nintendo codes are even unused! The game comes with free shipping, as well.
I've ordered several used games from Gamefly, and they've always arrived in nearly perfect condition -- some looking brand new!
If you're interested, you might want to get a copy soon - this appears to be a sale price.
Link:
GameFly.com - Mario Tennis Open
