Best Buy has the LG D2342P-PN 23 inch Passive Cinema 3D LED LCD Monitor for $200 with free shipping. Includes a pair of lightweight 3D glasses. Normally found for around $230.
1920 x 1080p, 5,000,000:1 DCR, 5ms response time
250cd/m2 brightness, LED backlight, HDMI, DVI & D-sub
Still a 60-75hz refresh rate.