I have my eye on a Factor 4 used, I played it and it was nice. I have a question though, I keep hearing about this Pre Fender business. But if Philip Kubicki is manufacturing the basses now aren't the post Fender ones better? Also how do you tell the difference?
Have a boo at Kubicki's website. There is a detailed description of the current design aspects of the Factor, Ex Factor and Key Factor basses and contact information too. As for the difference, you can get a multitude of different body woods that I don't believe were available a few years ago. http://www.kubicki.com/
Go to Yahoo groups, the kubickibasses group http://groups.yahoo.com/group/kubickibasses/ Under the files section you'll find a comparison of Fender to non-Fender to the Key Factor.