You're the guy who wanted to buy it from eBay right? Well, if I were you, I would ask your friend if you could have a look at it, and run it to make sure it's working fine. $130 is a pretty good deal for it, with all those games. You could probably get a better deal on eBay, but it's less reliable; at least this way you know exactly what you're getting and you don't need to use your credit card online etc.
Also, is that Rogue Squadron II or III? Not that you shouldn't buy the GameCube if it's III, but it's a worse game..