I love clothing that is influenced with trends from the past and the present. Old-fashioned styles can be extremely trendy when built in to a modern day wardrobe! There are a lot of indie labels/boutiques that carry really cute, old-fashioned clothing.
Try: Many Belles Down, Etsy.com, modcloth.com, or Tulle.
Here are some of my favorite items that I think best represents a vintage style.
Yellow skirt, teal belt, floral print top: modcloth
dress: anthropologie