Running PS2 on My Desktop PC

I’m not looking to do anything shady. I just want to hook up my playstation2 so that it displays onto my monitor. I suspect I’ll need to get a TV tuner card to do this, but I’m wondering if someone can give me advice on exactly what I’d need to get to do this as cheaply as possible? In case its relevant I’m using a Dell Dimension 4100.

Thanks.