eBay with b2brenewinc has the certified refurbished 27'' AOC QD-OLED QHD 240hz G-Sync Compatible Gaming Monitor (Q27G41ZDF) for $320 - 20% off with coupon code FAVEDEAL20 [Exp 6/14] = $256 with free shipping.

• QD-OLED Panel, 240Hz Refresh Rate, 0.03ms pixel response time
• Adaptive Sync, HDR, QHD Resolution, G-Menu customization