Historically, I've updated my Mac every time a new release comes out (mostly of Macbook Pros). I've been doing this for about the past eight years. About a mon

Historically, I've updated my Mac every time a new release comes out (mostly of Macbook Pros). I've been doing this for about the past eight years. About a month ago I broke from that pattern and bought an 11" Air (right after the new Macbook Pros came out, and pretty far into the current cycle for the Air's). It was the first time that the new machine was way less powerful than the old one (also, so far, the best machine I've ever had). Usually I'd sell my old laptop for about 66% of the price of the new one. Originally, I sold them on Ebay, but it got to be a pain in the ass dealing with people there (I had one guy complain after buying a Macbook Pro from me that the screen had smudges on it. Not marks mind you, but "easilly wiped off with a rag smudges".) After that I started selling them either to friends or on craigslist.