"Phone not as described."

When the seller is at fault, should the buyer really have to pay the return postage?

I bought a used mobile phone from Yellow Ape on eBay. The phone was described as: "Unlocked, will work with all networks in all countries." "Phone is in perfect working order and in Grade A condition." I found that it was neither unlocked nor in grade A condition when I received it. Naturally, I was not satisfied with this. Yellow Ape did not respond to my initial messages through eBay and PayPal so I escalated the issue in the PayPal Resolution Centre. More than a week after the phone was delivered back to them, at my expense, I got a refund of the cost of the phone. I am grateful for this at least!