Groupon offers the HP L2201x 21.5" 1080p Widescreen LED-Backlit LCD Monitor, model no. LM917A8#ABA, for $139 plus $5 for shipping. That's the lowest total price we could find by $34. It features a 1920x1080 (1080p) native resolution, LED backlight, 5,000:1 static contrast ratio, 250 cd/m² brightness, 16ms response time, and DVI-D (with HDCP) and VGA inputs. Deal ends May 17.