PB Tech is selling some 23" LG 3D PC monitors for about $248 + GST.  

I have two of the slightly larger 25" 3D monitors. I useone with my desktop system and one as a 3D TV. They use "passive" polarised 3D glasses...exactly the same as the 3D glasses you get for $1 at the cinema. (Not IMAX glasses!) 

If you want a 3D screen to use as a very cheap 3D TV or watch 3D video on YouTube or look at your 2D  photos and videos in 3D (converted), then get one of these