I would hardly say that any of these deals turn anything gold. I believe that most places were offering just $200 for used iphones right before the vzw iphone came out, whereas they were going for much higher than that on ebay and craigslist.
Gold for companies, not the people they rip off when they buy their used phones from them. Still, I guess there is a price to be paid for security that you might not get from eBay or criagslist.