amazon.com has a today only special (gold box) on the Mobile Pixels Duex Pro 12.5″ 1080p USB Type C Portable Monitor for $214.99 with free shipping.

• Full HD 1080P Display: 12.5” IPS Screen, Full HD 1920×1080 display, Brightness 300 nits, compatible with USB Type-C and Type-A laptops, Mac, PCs, etc.（Not For ThinkPad X1）
• Flexible Rotation & Dual-Slide Sliding: Provides a full 270° rotation, with the option for a 180° presentation mode.