Purchasing an item without seeing it
1. A person purchases an item without having seen it. This transaction is valid. However, once he sees the item, he has the right to return it or keep it. This is irrespective of whether there is any defect in the item or not. Even if the item is exactly as he had envisaged it to be, he still has the right to return it or keep it.
2. A person sold an item without even looking at it. This person who sells the item does not have the right to take it back after he sees it. Only the buyer has the right of returning an item after seeing it.