Explore the best monitors under $400 in July 2025. We’ve compared 16 models from trusted brands like SceptreInc, Samsung®, Acer, Dell, Samsung®, Dell, HP, PhilipsComputerMonitors, Samsung®, SceptreInc, ArcticPro, Acer, Samsung®, AOC, SceptreInc, AmazonBasics, with prices up to $199.99.