Poor Little Rich Girl

Score iconic pieces from every era—Edwardian velvet gowns, 1950s sock-hop skirts, and last season’s Marc Jacobs babydoll dresses, for starters—at well-below-typical vintage prices at these twin north-of-the-river boutiques. Scarves, shoes, and funky jewelry round out the selection. Bonus: The Cambridge store, between Kendall and Inman squares, has a small parking lot, so you can pop in to browse without feeding the meter.