It's from experience. I worked at a wireless dealer and that's what I see. No one buys the 3G, it's not on the market, they don't want it. People still ask about the 3GS all the time. As well, second hand is the same, people upgrade to the 4 and sell their 3GS for a good $300 average. I did it with my 3G and my 3GS…