Just a few minutes ago, I made an Ebay purchase of the last Powerbook G4 I was missing-a 17" in some form or fashion. I was able to find an A1139-the last generation, double layer super drive version-to go with my 15" A1138. This gives me Aluminum Powerbooks in 12", 15" and 17"(all last generation models), and an 867mhz TiBook. I have to wait for it to get here from Canada, but the condition appears to be really good and the price wasn't terribly out of line. Shipping wasn't terrible, either.