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The rule is that Stamp Duty and Registration Charges should be paid on higher of two values i.e. Market Value or Circle Rate.
The buyer (you) will have to pay stamp duty on the difference between the market rate and the circle rate at the time scrutiny If this case is caught up.
Next consideration is cost of acquisition when you will be selling the property. You shall only be eligible to claim the costs that have been mentioned in the sale deed registered Thereby the capital gains would be more and more taxes shall have to be paid.