It's actually 2.66M + 5.5% VAT = 2.8M euros ($3.2M USD), as stated on the bottom of the auction page:
"VAT at the rate of 5.5% will be due on the total of the hammer price and fees charged to the buyer."
"VAT at the rate of 5.5% will be due on the total of the hammer price and fees charged to the buyer."