For $55 on Newegg you can get a 1024x600 10 inch laptop screen that wouldn't work with your computer. That is your cheapest option. You'll have to get used or save up for something more expensive. It is not worth it to get a $50 screen, and while you may not have enough for a $400 4k IPS monitor with a 1ms refresh rate, you should be getting at least a 720p monitor.