We all have heard that the Hermès Birkin is an “investment bag” because it behaves like real estate, appreciating over time. Many designer handbags, most of which are far more accessibly-priced than the Birkin, do the same thing. The Chanel Classic Flap, Dior Saddle Bag, Louis Vuitton Pochette Métis, and Hermès Kelly all sell quickly and often above retail.