$99 must be a magic price point…at least for me. When I see that a plug-in that I took a pass on has been reduced to this price I take notice and reconsider it in light of the new price. If the value proposition changes because of this new price, I might at that point pick it up.
There seems to be a lot of these markdowns floating around. Must be that whole end-of-year sale thing + the recent downturn in the economy + time for new versions to appear. Whatever. There are some decent deals to be had this month.

Now at a smashing new price...
Case in point: Guitar Center is selling Arturia Analog Factory for $99. This is a decent VI featuring either 2000 or 3500 (depending on the version) analog synthesizers sounds selected from the Arturia Classic Synths (Minimoog V, Moog Modular V, CS-80V, ARP 2600 V, Prophet V, Prophet VS and Jupiter-8V). With the 10% off coupon in their recent flyer, the price is $89.10 so I picked one up. Note that the GC advert seems to refer to version 1.0 of the plug-in but when I went in the store they handed me the newest 2.0 version.