Newegg offers the Asus 25" 1440p IPS LED-Backlit LCD Monitor in Black, model no. PB258Q, for $269.99. Apply coupon code "MPGAMER16" and check out via MasterPass to drop it to $244.99. With 99 cents for shipping, that's $20 under our March mention and the lowest total price we've seen. (It's a current best by $54.) It features a 2560x1440 (1440p) native resolution, and HDMI, DisplayPort, DVI, and VGA inputs. Deal ends October 31.
Note that the coupon can only be used once per account.