I've sold two Mac laptops on eBay--one 12" Powerbook G4 and the other a 13" Macbook (white). The 12" sold within 24 hours (August 2006) for $500 (!). The 13" sold within three days for $900 (I paid $1200 and it was 1 year old, refurbished). The 13" did come with some other goodies, like Parallels and Win XP Pro, however.