Buying Ram (MAC)

I got a mac, it needs more ram, apple has their ram for 300$…no way in hell im spending that much.
http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wo/8.RSLID?nclm=EFBC43B8


which one from newegg is the best 1gig stick? (thats compatible with my mac)