Clarification:
Regarding Ebay, if you have a return policy, you can set the return timeframe - 14 days to 60 days.
The seller doesn't necessarily have to pay for shipping in both directions.
- For NAD (not as described) returns: Seller pays return shipping and buyer gets full refund. So seller pays both ways.
- For REMORSE returns - changed mind, doesn't fit, don't like, etc., you can decide if you have "free" returns where the seller pays for the return shipping label, or buyer pays return shipping. If you charge separately for shipping (as opposed to "free" shipping in which seller builds shipping cost into the price of the item), you can deduct the original shipping from the refund amount and refund would be for the item price only.
A couple of years ago, I had a no return policy. Many buyers think they need a reason to return if a seller has a no return policy so they will either lie about the item being NAD or they will do damage.
After a buyer damaged an item in order to return it, I changed my policy to 30 days, buyer pays return shipping and in nearly 3 years, my returns haven't increased nor have NAD complaints been filed by buyers in order to avoid paying return shipping.
ALso, TRS (top rated sellers) who have a 30 day return policy can deduct up to 50% from the refund if the item isn't returned in the same condition as sent.