It is not so much is monetary value but what Russia can get in return in physical products and services.. there is no point in selling to West if they cannot buy anything in return.
I'm not sure how much Russia is selling their oil now to India, but I'm pretty sure they're already selling it for way below market value to India and China right now. If Russia is selling it to India for $80 now and the West offers $90, it's still way below market value but they're still going to sell it to the West.
i even suspect other OPEC+ members involved as its not easy to have such surge to a single customer in short time. Its in OPEC+ interest that India buys Russian oil.