All under 500 but.... i dont know exactly what you mean with cheap...
BenQ Zowie XL2730
Acer XF270HUAbmiidprzx <<<<< IPS panel
ASUS MG278Q
AOC Agon AG271QX
iiyama G-Master GB2760QSU-B1
Acer Predator XG270HUomidpx AOC Agon AG271QG <<< IPS and G-Sync but over 500$$$