Nope... PayPal and eBay will always (99%) of the time side with the buyer. It's been this way for years and there a numerous horror stories from sellers regarding this. PayPal will seize your funds and hold them while the issue is investigated. When, not if, they side with the buyer you have zero recourse.
Having said that, I sell on swappa and eBay all the time but I know the risks. If you sell only ship to the PayPal confirmed address, send it signature required and fully insured. Still not a guarantee that you'll win a dispute but it helps.
The buyer can simply file a 'not as described' case 5 months after the sale and all they have to say is the phone was defective and PayPal WILL side with them.