Three categories must be distinguished:
1. A legal option (khiyar) can give one party a right to rescind under specified conditions.
2. Iqalah removes an earlier valid sale through mutual agreement.
3. A fresh sale is a separate transaction on new terms.
Returning a watch originally sold for Rs 50,000 by agreement is iqalah. Buying that watch today for Rs 45,000 as an independent contract raises a different legal classification.