Looking for that “special” piece of art you can’t do without for your mountain house or condo? Then, check out some of the offerings from Swann Auction Galleries’ Vintage Poster Sale. A poster titled, Winter Sports/New England/The New Haven Railroad” is on the block for an estimated $1,500-$2,000 and it’s the only known copy of the unrecorded poster. A Flexible Fleyr/Splitkein/Mt. Mansfierld Ski Areas, Stowe will be the same price, while a 1938 advertisement for the National Championship/Brattleboro will likely go in the $1,200-$1,800 range. More information on the sale is abvailable by calling Caitlin Brown at (212) 871-3020, Ext. 112.