Prices are set as per Indian market demand and supply, all cryptocurrencies are too volatile than usual commodities and assets.
We have to keep a stock and take the risk when the markets move wildly hence the spread between Buy and Sell Prices are higher.
Due to the current Indian Market, volatility is very high and all exchanges have varying prices.
This opens up an opportunity for Crypto Arbitrage, please check deposit/withdrawal status at other exchanges before initiating any transaction. Further due diligence is recommended.