I also got an M200 for $149, based on a correct guess. When I asked the Outlaws how to order so that the correct price was charged (half off), they instructed me to make a note about my correct guess in the "comments" section of the order form.
My credit card was charged appropriately.
However, I also seem to recall being told I had to pre-order by 12/31/02 to get the half off price. I would contact Outlaw directly to see if this is true, or if I'm remembering incorrectly.