Rights of a consumer

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If I buy a very costly Plasma or LCD T V today from a T V Shop by paying full cash today evening and tomorrow morning the manufacturer announces that the price of the particular T V has now been reduced by 10%. 1.Am I eligible for the discount?. 2.May I question or take to task the salesman or the T V shop for not informing about the imminent price drop?. 3.May I approach the T V manufacturer with my grievance? Today most of the gadgets or lifestyle products are above the common man and even if one aspires to have them the common man ends up losing more money.