nVidia 3D Vision Discover
nVidia is proposing a "3D intro kit" for almost nothing at selected US locations. For a limited time, get a FREE copy of World of Warcraft Classic and pair of NVIDIA 3D Vision Discover glasses with purchase of selected GeForce GPUs from several US retailers.
Pro: it is free or almost free; Con: the kit includes anaglyph glasses, not the good 3D Vision ones; Advantage: it works on any existing monitor, so you can taste 3D Games on your PC before investing in the more useful but more expensive Samsung120Hz + 3D Vision kit. Read the details on the nVidia web site here.