I Want A Laptop Under $600 Which Should I Get?

So me and my dad are looking into buying a laptop. He wants to keep it cheap. He wants it for school which means it needs to be able to handle the internet and have a decent typing program. I also spend a lot of of time watching videos whether it be on youtube or anime freak I want it to load the videos fast enough that i dont have to wait for buffering. I want it to play World of Warcraft. Yeah school i need it for that too but how often do I really need to type anything I mean really I am a

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