Most portable monitors are inexpensive, but this is often reflected in their quality. We’ve noticed a wide range of build quality, design, and image quality among portable monitors that retail below $150. It’s possible to find a great portable monitor on a tight budget, but we recommend sticking to models tested by a professional reviewer.A handful of portable monitors, such as the Viewsonic ColorPro VP16-OLED, are priced above $300. These rare models back up their price with special features such as a top-notch OLED panel or built-in battery. Paying extra for a quality monitor is worthwhile,