That’s a safe bet — the bid at the moment at Heritage Auctions is at $450. How much is it worth?

Howard Chandler Christy poster from 1918, for the Third Liberty Loan to finance World War I - Heritage Auctions image
Heritage Auctions describes the poster:
World War I Propaganda Poster by Howard Chandler Christy (Forbes, 1918). Third Liberty Loan Poster (20″ X 30″) “Fight or Buy Bonds.” War.
Howard Chandler Christy was so good at illustrating iconic beautiful women in uniquely styled poster art, that they soon became known as “Christy Girls.” He used some of these images to sell war bonds during WW I. His lovely art was instrumental in raising countless millions for the war effort. An unrestored poster with good color and an overall very presentable appearance. It may have tears, pinholes, edge wear, wrinkling, slight paper loss, and minor stains. Please see full-color, enlargeable image below for more details. Rolled, Fine+.
Posters from the wars are great teaching tools. I tell my students to watch to see if their parents or grandparents have any of these old posters lying around. $450 would buy books for a semester at college.
Heritage Auctions plans to sell this poster, and many others, this coming Sunday, January 8.