When you registered to bid you confirmed the following:
I agree that I have read and understood Bonhams' conditions of sale and I wish to be bound by them, and I agree to pay the buyer's premium and any other charges mentioned in the notice to bidders. I understand that this affects my legal rights.
For all Sales categories excluding Wine, Coins & Medals and Motor Cars and Motorcycles:
Buyer's Premium Rates
25% on the first €50,000 of the Hammer Price
20% from €50,001 to €1,000,000 the Hammer Price
12% on the excess over €1,000,000 of the Hammer Price
TVA at the current rate of 21% will be added to the Buyer's Premium and charges.