So the page for the Solstice event said that every item in Eververse that was added for Solstice of Heroes would be sold for Silver AND Bright Dust. Even with Solstice of Heroes being extended by a week some items never went up for sale for bright dust. The Sunglasses projection, Palm Tree projection, Crab projection, and Beach Ball projection, which were added with Solstice of Heroes, were never available to purchase for bright dust. So oversight or lie Bungie? Your move on the answer and possible fix.
The sunglasses ghost was sold for bright dust the week of August 6th. The first week of solstice.