I highly suggest you save until you reach the $800 - $1000 range. You're looking at budget notebooks right now, which are not suited for video editing.
Try to buy a notebook that will last.
I don't have that kind of cash on me. I just got my hours cut by 3/4 at work. I only work 9 hours a week now. I can't keep driving home from my college, just to type up a paper and drive back.