Last week saw an ad for a leftover 04 M6 for $8005 under sticker. That amount probably went up with the new GM incentives that came out yesterday. As diverdan said, they are just waiting for some fool to come in and bite.
The joke is Northern California thinks it's some kind of independent republic.
The dealer that was advertising the leftover 04 M6 was Pearson in Sunnyvale, CA. Marina in San Leandro, CA has a couple of very nice used ones -- black/black, pulse red/black. They're both A4s, though.
Try searching around San Jose, Oakland, and Richmond, CA. There was a dealer in Richmond that seemed to have a huge inventory -- but, then again, they might be lazy and forget to update things when cars sell.
EDIT: Just enter zip code 95113 and you'll get a good look all over the area. The amount of 04s left is dwindling. Good luck.