Lenovo ThinkVision M14t 14" Portable IPS Touchscreen Monitor with Active Pen $447.46 (UNiDAYS) @ Lenovo

I think this is the lowest price yet.

Tech Specs
Datasheet

Display 14" FHD (1920 x 1080) IPS 16:9 Aspect Ratio

Brightness 300 cd/㎡

Dynamic Contrast Ratio 3M:1

Touch Screen Yes (10-point touch display)

Colour gamut 72% NTSC

Response 6ms (Extreme Mode), 8ms (Normal Mode)

Ports 2 x USB 3.2 Gen 1 (by USB Type-C)

Cable USB Type-C to Type-C cable

Weight 698g* (display component only)

Thickness 4.6 mm* (display head only)

Stand tilt -5° / 90°

Pivot -90° / 90°

Security Kensington Lock Slot

Eye-care tech TÜV Rheinland Low Blue Light

Pen/Digitiser Yes (with 4096 pressure levels)

USB Type-C power delivery (W) Up to 65 W

What's in the box

1 x Monitor with stand
1 x ThinkVision M14t sleeve
1 x Active Pen with battery*
1 x L-shaped dongle
1 x USB Type-C to Type-C Cable (1 m)
1 x Quick Setup Guide
1 x Pair of clips