Who sold their business in 1928 for $7.3 million and later bought it back for $1 million?

Helena Rubinstein (born Chaja Rubinstein; December 25, 1872 – April 1, 1965) was a Polish-American businesswoman, art collector, and philanthropist. A cosmetics entrepreneur, and was the founder and eponym of Helena Rubinstein Incorporated cosmetics company, which made her one of the world's richest women.

From 1917, Rubinstein took on the manufacturing and wholesale distribution of her products. The "Day of Beauty" in the various salons became a great success. The purported portrait of Rubinstein in her advertising was of a middle-age mannequin with a Gentile appearance.

In 1928, she sold the American business to Lehman Brothers for $7.3 million, ($88 million in 2007). After the arrival of the Great Depression, she bought back the nearly worthless stock for less than $1 million and eventually turned the shares into values of multimillion dollars, establishing salons and outlets in almost a dozen U.S. cities.