Buying Resale Flat Owner demanding cash amount

A buyer is seeking advice on purchasing a resale flat where the owner is demanding a portion of the payment in cash to reduce the official sale value. The buyer, who is salaried, is concerned about potential repercussions. The advice given highlights that this practice is illegal and can lead to higher future income tax liabilities due to a reduced cost basis. It also points out the difficulty of legitimising 'black money' for salaried individuals.