There appears to be a misconception. In this topic, it seems that "artifact", though used correctly, leads one to believe that items recovered from the wrecksite were sold on ebay. That is not the case. The "artifacts" that were sold belonged to items donated to the museum in Virginia by survivors and their families.
The artifacts recovered from the bottom of the ocean by RMST have not been sold, nor can they be per court orders. Though RMST has tried legally to acquire the rights to sell some of the pieces, they would NEVER provoke the wrath of a powerful court.
Unless I'm mistaken, a large number of the sold pieces included pieces of the Aks collection, donated by Frank Aks and his family, among others.