Using Craigslist to sell is like the Wild West. There’s no rules or enforcement, and many criminals use it. I’m not going to risk getting robbed trying to sell my iPhone.

Amazon has locked out private selling for most mainstream items unless you’re a business with a PO directly from the manufacturer. Also, their fees get higher the more your item competes with their own sales. Totally anticompetitive.

eBay and Adevinta are still (nearly) billion-dollar companies that compete for person-to-person transactions.