Yes, definitely make sure it fits, as best as you can tell! It's not easy when you're just getting started to evaluate fit, so if you have an experienced friend who can help, that would be the way to go.

If it fits, and you want to go for it, I recommend being very aggressive on the price negotiation. I believe the closeout price for that model right now is between 550 and 600, so if I were you, I would aim for around 400.