It’s new iPhone season again and you can expect to see a rush of older iPhones flood the market. It’s a buyers market, but that doesn’t mean the sellers can’t have some fun. If you’re looking to make a quick buck, however, you can easily pop up on your favorite sales site to make back a bit of your investment. I, personally, have funded a few new iPhones with the sales of old iPhones and it’s quite surprising how well this hardware holds its value. Here are my top tips.