One can purchase a Power Max G4 at various online websites. Some websites include Every Mac, The Mac Store, and Gigaom. At a discount price, it can be purchased from Amazon.

the power book G4 can use the Airport Extreme card.

An Apple Mac G4 Cude can be purchased from a variety of retailers. Some of these retailers are eBay, Amazon, PowerMax, CubeOwner, Kemplar, and SmallDog.

Power Mac G4 was a series of personal computers that were sold by Apple between 1994 and 2000. Most likely going to the Apple site you could research this old type model.

Sims 3 will not work with a G4 iMac. The game requires a recent Mac with an Intel processor.