I just ordered a pre owned Grade 8/10 Macbook Pro 13.3 2.4ghz 4gb ram 160gb for a total of about $500 (firesale). The model number on my shipment confirmation is supposedly MC374LL/A. But when I search up this model it shows up as a 250gb hard drive. Is this a good deal I am getting? Does anyone know what model this macbook pro may be and when it was released?