Thanks for the Suggestion. I think this has already been suggested in the Suggestion thread. 

I cant recall if this has been accepted or not.

Moved to suggestions section.  This was already suggested for beacons, pretty sure it was declined. 

io proporrei di integrare al Mercato nero non solo i pacchetti di scrigni con le chiavi, ma anche Solo gli scrigni da poter poi abbinare con le chiavi che uno si ritrova in eccesso.

I would propose to integrate the black market not only the chests with the keys packages, but also the chests Only you can then match with the keys that one finds in excess.