I've decided to get the new MBA (11"/8/256/i5). I've also decided to sell my current 2011 MBA (11"/4/128/i7), and I'm a bit curious on an expected value. A light usage gives about 3.5 hours of battery time. Watching Youtube reduces it to about 1.5 hours. I've had no issues what so ever with this machine, it feels snappy enough. Anyone who dares to give me a price estimate? Thank you.