He meant that you could have sold the iPhone on ebay for $500. You could have then bought a Nexus 5 for $400. You would then have an Nexus 5 and $100. By jus

He meant that you could have sold the iPhone on ebay for $500. You could have then bought a Nexus 5 for $400. You would then have an Nexus 5 and $100. By just smashing the iPhone (as they did here) you just get a Nexus 5.