What happens to used iPhone prices before and after an Apple event? (chart) - CNET

What happens to used iPhone prices before and after an Apple event? (chart)
CNET
iPhones are far and away the company's most traded-in item. Last week, the company said it's made around a million offers for used iPhones in just the month of August, and has been receiving nearly 30 percent more iPhone 5 trade-in offers than iPhone ...