Who were the most expensive players in the past IPL auctions?

England all-rounder Ben Stokes was the IPL 2018 auction's most expensive buy after being bought by Rajasthan Royals for ₹12.5 crore. MS Dhoni was the most expensive buy in the first-ever IPL auction in 2008, bought by CSK for $1.5 million. In 2015, Delhi Daredevils bought Yuvraj Singh for ₹16 crore, making him the most expensive buy of IPL ever.