ViewSonic VX2758-C-MH is a curved gaming monitor capable of 144Hz variable refresh rate, and a FullHD maximum resolution. This monitor is currently available for $193, which is a pretty good deal since this unit has been launched with an original listing of $250.
This monitor also comes with AMD FreeSync technology, 1800R curvature radius, dual integrated speakers, 1920 x 1080 maximum screen resolution, 144Hz refresh rate, Flicker-Free, Blue Light Filter, TN panel, 2x HDMI ports, 1x DisplayPort and an USB hub. If you're planning on getting a cheap gaming monitor that is curved, too, then this is the model that you should go for. The performance of this model aren't the best, but it has a 27-inch diagonal, 144Hz refresh rate and it costs under two hundred dollars.