Yes.
For example, an apparently working item may suddenly fall apart. Or a ring may have been offered with a proposal that was refused.
Don't take it personally. Ask that the item be returned for a full refund (of the original payment) and express your concern that the buyer is unhappy with the purchase.
Do NOT refund until you have the item back in your hands. However, in some instances, a photograph can be accepted as proof of the problem.
it is best to avoid arguing with the customer. If he returns the item with Confirmation of Delivery, he will win a refund from Paypal, and you will get a black mark on your seller account.
It's business, not personal.
It is useful to self-insure yourself against losses from returns. This just means adding a few pennies to each price or fee to cover the occasional problem.
