The deal, approved by the EGoM on disinvestment headed by Finance Minister P. Chidambaram, is expected to garner about Rs.5,300 crore for the exchequer. Petroleum Minister M. Veerappa Moily said the stake sale will be at a 10 percent discount on the market price. ONGC and OIl would buy five percent stake each. The 10 percent stake is the equivalent of 24.27 crore shares.