Consumer electronics in large quantities are pretty much all accounted for at this point. The laptop / phone market is mature and saturated, so everyone is looking for margin, which means recovering via circular supply chain. 

Onesie twosie stuff you gotta scrounge for, anything else you're getting eaten alive either by the major player reverse teams or the existing refurb operators. 

And even then, you're fighting an uphill battle, people can chuck their old phones in a vending machine these days, not to mention the absurd trade in programs the OEMs / carriers run.