Anything from 22" and larger will be fine. For sale are these fully functional, refurbished LCD flatscreen monitors. Available in 15", 17", 19", 20", 22", 23", 24" sizes and supplied with an HDMI adapter.
eBay
raspberry pi 7 inch screen, IPS TFT LCD HDMI Display Touch Screen Monitor 1024*600
Aliexpress UK
Aztine portable monitor. Resolution Full HD (1920 × 1080). Refresh Rate 60 Hz. HDMI to Mini‑HDMI cable (~47 in). Note that iPhones require a Lightning-to-HDMI adapter. Foldable smart cover with two standing angles.
eBay
FEELWORLD P6XL 6 Inch 1200nit Aluminium Built-in Battery DSLR Camera Field Monitor Touch Screen 4K HDMI High Brightness
Aliexpress UK
Dell U2913WM 29” Ultrawide Widescreen LED Monitor – Full HD 2560 x 1080 – Vivid Colour, Versatile Connectivity, Eco-Friendly Design. Seamlessly connect to multiple devices with DisplayPort 1.2, Mini DisplayPort, DVI, HDMI, and USB 3.0 ports.
eBay
G-STORY 12.5 inch 4K HDR portable game monitor IPS screen, suitable for Xbox Series S, with 3D stereo 2 HDMI 2 headphone ports
Aliexpress UK
1 Portable Monitor. 5V-3A adapter to connect the screen via the Type C to USB cable. If can not light up the screen, need extra power on the screen. 1 Type-C to Type-C Cable. 1 USB-A to Type-C Cable.
eBay
11.6 Inch Portable Monitor HDMI-Compatible Laptop second screen Gaming Extended Display For Switch/PS4/Xbox/Raspberry Pi
Aliexpress UK
Lightning-Fast 300Hz Refresh Rate : Gain a clear edge over your competition with a groundbreaking 300Hz refresh rate. - Adaptive Sync Technology : Say goodbye to screen tearing and input lag.
eBay
KINHANK K16 Pro 16" Gaming Monitor Smart Portable Monitor with Google TV 2.5K HD 144Hz for PC Laptop Phone Xbox PS4 PS5 Switch
Aliexpress UK
Maximum Display Resolution: 1920 x 1080. 22" Computer Widescreen PC Monitor (1920 x 1080) - DisplayPort. Connections: 1 x HDMI (Via Free Included Adapter). 23" Computer Widescreen PC Monitor (1920 x 1080) - DisplayPort.
eBay
Kinhank 18.4" 4K 60HZ Portable Monitor K18G with Google TV HDR10 IPS Display Gaming Monitor For PC Laptop Phone Switch
Aliexpress UK
USED IN VERY GOOD CONDITION. No issues, still fully functional. just upgraded my monitors. doesn't include a HDMI cable. monitors have been used for a few years.
eBay
VILTROX DC 550 5.5 Inch 1920x1080 4K Touch Screen HDMI Profissional Camera Studio Monitor 3D LUT Director Monitor
Aliexpress UK
Anything from 22" and larger will be fine. For sale are these fully functional, refurbished LCD flatscreen monitors. Available in 15", 17", 19", 20", 22", 23", 24" sizes and supplied with an HDMI adapter.
eBay
7.8 inch Touch Monitor Long Wide Screen HDMI PC Temperature Display PC Sensor Panel Display Small Extender Monitor
Aliexpress UK