As far as I know MRP is something that never reflect true value of a product or service. Most of the times they are set way higher than the rate at which it actually get sold. Mainly because of two reasons,
[*]There is no regulation on how HIGH company can price their product (Electronics/Non-natural commodities)
[*]To have super high profits, some stores may charge premium and some just show they are giving BIG discounts which are really marketing gimmicks.
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Coming to your question,
Market price is around 4k so 7.2k is just an exaggeration in order to show big discount number.