I requested for a return because the item I got was not as described. It was a leather jacket replica - it had major dents on the leather, flaking off in some parts, white stuff all over it - there were even some numbers written using white stuff, maybe chalk.
It was NOT a cheap item though - £119. So I was surprised when I got a refund and instead of a prepaid postage label, the message stated "You don't need to return this item to the seller - you can keep the item."
You need to make sure you get your full refund. If not, involve eBay customer services.
Sometimes sellers find it's not worth their while to pay for return postage (which is their responsibility as it's not your fault it was unsuitable). But make sure you get your full refund back before you bin it.