Swann Auction Galleries and Heritage Auctions deal in authenticated pieces and provide detailed condition reports.
Depending on your budget and intent, you can source posters from specialized retailers or auction houses.
The International Vintage Poster Dealers Association (IVPDA) is a trusted network for finding established dealers worldwide. Reproductions (Décor/Affordability) buy vintage travel posters
If you are paying a premium for an original, look for these specific indicators:
Sites like The Vintage Poster and Vintage Posters by La Belle Epoque offer original lithographs ranging from approximately $350 to over $1,000. Swann Auction Galleries and Heritage Auctions deal in
Sites like AllPosters or Art.com carry vast collections of "vintage-style" prints at lower price points. Identifying Authentic Originals
The Vintage Map Shop and Printed Originals offer high-quality archival prints, often starting between $30 and $85. How to Identify Authentic Vintage Posters: A Collector's
How to Identify Authentic Vintage Posters: A Collector's Guide