I am new to purchasing a notebook so I have a quick question. I am looking at a refurbished Macbook Pro 13-inch 2.26GHz C2D 4.0GB. COmes with wifi as well. The cost is $450 with a 90 day warranty. The seller says the computer is roughly 4 years old. Totally refurbished. Is this a good deal as I have no knowledge in this department. Thanks!