An iconic dress worn by Vivien Leigh as Scarlett O’Hara in “Gone With the Wind.”

WHAT: The dress worn by Vivien Leigh as Scarlett O’Hara in “Gone With the Wind” sold for $137,000 last month at Heritage Auctions in Dallas.

MORE: The jacket and skirt, originally rescued from a trash bin for $20 in the early 1960s, were top lot in the sale of a private collection of the film’s props and rarities.

SMART COLLECTORS KNOW: Iconic items from certain classic films and TV shows are good as gold.

HOT TIP: The fact that the dress was part of a known collection known to be authentic boosted price. Isolated finds generally do not do as well.

BOTTOM LINE: Only a handful of films become as famous as “Gone With the Wind.” And only few items from those films become iconic.