I want to sell my macbook to buy a macbook air. It's a white penryn 2.4ghz macbook 2gb ram 160gb HD. Just under 3 months old now. What would it be worth if I sold it on ebay or something. I live in australia and they retail for $1800. Also how much do you think I would be able to get for it if u maxed out the ram to 4gb and HD to 320gb?