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
2.1 Inch Round Screen IPS Dynamic Display Temperature AIDA64 Circle Monitor DIY Covering 120/240/360 Water Cooling PC CPU AIO
Aliexpress UK
EIZO ColorEdge CG247X 24.1" inch 1920x1200 IPS LED Display Monitor Screen. Condition is Used. Shipped with Royal Mail Tracked 48.
eBay
Hagibis 3.5inch IPS Mini Screen AIDA64 Mini PC CPU RAM HDD Data Monitor Display Sub Screen with USB C Hub for Laptop PC MacBook
Aliexpress UK
Perfect Displays/Screens, Slight scratches or dents in the base and monitor borders. Good Monitors.
eBay
LESOWN mini Screen 5 inch Compact USB Monitor Touch HDMI 800x480 IPS Little White Portable Second Display for Windows Laptop PC
Aliexpress UK
Used monitor, no box just a power cable
eBay
Bimawe 17 Inch Portable Monitor 1080P FHD 1920x1200P 100% sRGB With Screen Foldable Stand For Laptop Phone Xbox PS4/5 Switch
Aliexpress UK
The HP X24ih 23.8" 144Hz FHD IPS LED Gaming Monitor in Black is designed specifically for gaming with features such as a fast 1ms response time and a high 144Hz refresh rate for smooth and fluid visuals. The IPS LED display delivers vibrant colours and sharp images, while the anti-glare technology ensures comfortable viewing for extended gaming sessions. With DisplayPort and HDMI Standard inputs, this monitor offers versatile connectivity options for various devices. The sleek black design and 16:9 aspect ratio make it a stylish and functional addition to any gamer's setup. important note: the pc does contain paint marks all over the back of the pc
eBay
VEOUT Gift 15.6inch 60HZ Gaming Portable Monitor for Laptop, 1080P IPS Display LCD FHD External Second Computer Screen for Phone
Aliexpress UK
SUPPLIED WITH DVI TO HDMI ADAPTORS. NEW POWER AND HDMI CABLES SUPPLIED. A AND B ONLY.
eBay
UPERFECT Delta 15.6"Dual Monitor Portable Gaming Triple Pc Display Laptop Screen 1080P HDR Folding Adjust For Phone Game Console
Aliexpress UK
This monitor is suitable for a range of activities including gaming, graphic design, casual computing, and CCTV.
eBay
8/7-inch Touchscreen Portable Monitor 1024x600 60Hz Display HDMI-compatible PC Gamer Laptop
Aliexpress UK
Monitor ASUS VC239H 23" Full HD IPS LED Gaming HDMI VGA DVI-D 16:9 5ms
eBay
Unew 8 inch Raspberry Pi Monitor 1280x800 16:10 HDMI for Raspberry Pi 5 4 3 Orange Banana Pi DIY Projects Touchscreen Display
Aliexpress UK