Apple doesn't have refurbs yet. I've seen used ones on sites like eBay though they aren't much of a discount. The best price on one right now would probably be a new one through Best Buy with a movers coupon or student coupon. As for the screen size, if you value the portability and weight I'm sure you'll be fine. I went from an 11" Air to a 13" MacBook Pro and missed the small size and weight so I ended up switching back.