Has there been a thread here to define what a complete Prince music collection should include? Perhaps one that is limited to official album releases, including NPGMC downloads? It would be a good reference to check your own collection against. There will be disagreements on the periphery but an 'essential' fams collection statement should be possible. Maybe its somewhere in like the Prince Vault?
[Edited 9/17/16 5:39am]
[Edited 9/17/16 5:39am]