Silver box won't open

if it is later on in the server, it is better to sell all silver boxes. You will make a 20,000$ profit per box. If you hunt around 1k cav or inf, you often retrieve silver boxes as hunt prizes, which you can also sell. Hunts are determined by overload capacity. I've retrieved silver boxes also with hunts of 800 inf or cav as well, though at a lesser frequency. Good luck, as if have more q.