eBay with Buydig has the LG 34GN850-B 34" UltraGear QHD 1ms IPS G-SYNC 144Hz Gaming Monitor on sale for $697 - $100 off with coupon code SUMMER20SAVE [Exp 7/13] = $597 with free shipping.

3440x1440 (QHD), HDR 400, 144Hz refresh rate (160Hz overclock), 1ms response time

DCI-P3 98% color gamut , 400cd/m2 brightness, 1x DisplayPort 1.4, 2x HDMI