Amazon has the well-reviewed Barbie: 10-Movie Classic Princess Collection (DVD) for $14 with free shipping on $35+ or with Prime.

This collection includes Magic of Pegasus  (DVD Movie), Rapunzel (Blu-ray Movie), Swan Lake, Thumbelina, Barbie: A Fashion Fairytale, Diamond Castle, Princess Charm School, Princess and the Pauper, Secret Door and Three Musketeers.