Help, please, understand
 

Hello, please explain this point. At Sotheby's there is consumer interest. If the buyer is offered the highest bid so after the hammer blow he must still pay extra this is the consumer interest?
    For example, as stated on the site, Abramovich bought Triptych "for 86 261 000 $. This is the final amount paid to them or we need to count more consumer interest? If yes, then what? 12%of the amount?

barbadui, in any directory on Sotebis on Russian trading information is available on the prize of the buyer.
Open and read.
If you do not see the catalog online.

Thank you. And could not give a link to a directory where it says how many bought and paid what percentage?

barbadui, here, for example, he catalog
click on any lot sold see, for example, Lot Sold. Hammer Price with Buyer's Premium: 25000
just 25 thousand - the price is a Buyer's Premium (the percentage of the auction). If my memory serves me, then at Sotheby's, he is 12-25%