Startup Idea : An app for Artist and Art Collectors

The app will let artists from their phone create art work in the workspace where they have pencils paint etc and once the artist is done with their masterpiece they can post it and share it where art collectors and other artists can comment on or bid with virtual money on the artwork. Platform would be something like instagram. Ultimately the Artist will have there own art gallery and art collection. Feedback. Collaborators. All welcome. Thanks