You: Hey PayPal, this guy totally screw me out of the money I sent him using your service, which I like to use for the consumer protections it offers in cases like this. I bought a used item from the guy, and the item he sent me was broken despite my specific inquiry into its condition and his statements that it was in good working condition.
PayPal: We'll get back to you when we hear from the seller.
Seller: That shit was fine when I sent it out, yo.
PayPal: We are sorry, but we cannot refund your money. The seller says he sent you good shit.
You: