Amazon with INNOCN has the INNOCN 27" OLED 2560x1440 Gaming Monitor (27A1S) for $430 with free shipping.

• 2560x1440 resolution, 240Hz refresh rate, G-SYNC compatibility
• 2x DP, 2x USB-A, 1x USB-B, 1x HDMI, 1x 3.5mm audio jack