To those who say you need a monitor/os...
everybody needs an os, Linux won't run most PC games... That's 100$ more, however, on the other hand many can just upgrade their gpu and ram and they'll be up to date (I have an old i7 it's about as good as today's i5 and I could just put a decent video card if I wanted to play games on my work PC... It has 64GB of ram ... No need to upgrade this).