eBay with Prycedin has the certified refurbished HP OMEN 31.5" QHD VA 165Hz Curved Gaming Monitor (780K6AA) on sale for $162 with free shipping. Includes two-year Allstate warranty. 

• 31.5" VA Display (2560 x 1440), 165Hz refresh rate, 1ms GtG Response Time
• 400-nits, AMD FreeSync, 2 x HDMI 2.0, 1 x DP 1.4, 1500R Curvature