The collections feature is a powerful one, very suitable for database-ish pages like portfolio, blogs, products and so on.
However, it is currently not possible to export collections in any way. Though we can export a site as html, none of the collection items are included.
We might need to do some mass-changes on a collection at some point, or we might need to compare the current table contents with a to-be-imported csv.
This is not possible without the ability to export the collection.
As such I would like to submit this request for enhancement, to add the ability to export collections.