50€ - 23" 2048 x 1152px Samsung monitor for sale
23 inch 2048 x 1152 pixel monitor for sale: 50€
Height adjustable and rotating to portrait.
Relatively old (7 years) but was top of the line when bought and is built like a tank.
Replaced because I needed higher resolution and refresh rates, but if you're after a nice hi-res screen (for working on 2 documents side by side for example) on the cheap, then this could be ideal for you.
Here's its old Amazon listing...
Pick up in Lavapies