At this point in time, limiting your search to only 06 & 07 models gives you a fairly small pool to chose from, especially if you're one of those people that have to have a "sombrero" instead of an "L":
100 series Production Numbers for the USA
If it were me, I'd widen my search to include all 5spd models, and if you happen to find an 06 or 07, that's great, but I wouldn't bypass a good 03-05 just to wait for an 06 or 07.
It's interesting that the large drop in sales coincides with the introduction of the Sequoia. I suspect we would have a much larger pool of cruisers to choose from without the big tree.