We are currently working on a fix for the newly introduced Loot Collection Pill. At the current time you can not sell the pill back to the Trade Terminal, but this will be fixed in the next patch. Please note that the pill will still not be tradable via Auction, but exchanging them via PvP trade will be possible. Source
I guessed they would only state this on monday. Seems they are getting faster in realising their mistakes. :)