As you probably know, NCBE has 3 released MBEs available for purchase, as well as the 2006 MBE Annotated Preview (online practice exam with 100 questions from recent MBEs).
I was able to get my paws on the July 1997 MBE as well as the 1992 MBE (over 500 questions). I also have the 2006 questions which I copied from the online practice exam. My subscription expired with the February 2007 bar exam so I’d have to purchase another $26 subscription. I’m not sure if I’ll do that since I already have the questions and explanations, but the practice is very helpful especially at work.
Updated 5/19/2008 – there was a link from which you could download the 1992 and 1997 MBEs, but I’ve been notified that the link is now defunct. So shoot me an e-mail and I’ll forward them to you.
Does anyone else know of any other released MBEs other than the 1991, 1992, 1997, 1998, and 2006 ones?