Staff notice: This user has been permanently banned for offensive content, sockpuppeting, and trolling.
How would anyone with no prior knowledge of this place be able to tell what's going on? Why a drop zone versus a hidey-hole packrat cache or a totally-legal exchange, or heck, a charity donations center?
Also, if the Foundation found it and tried to contain it, why wouldn't the aliens stop using that drop zone?
To be fair, I think an alien charity dropoff center like a Goodwill or Salvation Army center would be more interesting to me than a black market drop zone. The media is all over weaps and cash and DANGER!!! but you learn way more about a person's way of life from their trash.
ETA: "Contraband", as per Google definition, means "goods that have been imported or exported illegally." So yes.
Or maybe an alien bootleg fleamarket. Badly dubbed alien sitcoms 5/$10, totally authentic antique pottery from Alpha Centauri (Um, what "Made on Titan" sticker?), slightly used small appliances that are probably not stolen…