Hey guys I'm looking to purchase the 13" 2.4 mbp. I was planning on waiting until the next refresh in hopes of the sandy bridge, but my current laptop (dell xps m1530) has been crashing a lot recently and the giant 9 cell battery is about dead now, so I'm looking to buy the mbp in a week or so. My question is, if I were to buy it now and keep it in top shape, how much could I expect to sell it for if I wanted to get the refreshed mbp?