A unified media collection system comprises a local user agent with a primary metadata repository, and at least one foreign user agent with a secondary metadata repository. The secondary metadata repository is operatively coupled to the primary metadata repository. The local user agent is configured to compare the primary and secondary metadata repositories to identify missing media content available for purchase. The local user agent is also configured to purchase the identified missing media content to complete at least one media collection. The local user agent is adapted to deselect items from a list of identified missing media content for purchase, as needed. The local user agent is further configured to compare and keep the primary and secondary metadata repositories synchronized and up-to-date.