I checked the auctioneer's web site:

    http://www.charltonhallauctions.com/

They don't yet have any info posted on the Baldwin Collection auction
(in fact, the site still shows a "preview" for an auction in March),
but be advised that the fine print in their Conditions of Sale lists a
12% buyer's premium, plus 5% South Carolina sales tax.

Bill Burns
Long Island  NY  USA
billb@savvy.com