I'm currently at 321|320|426 GS, I have so many sealed weapon boxes from karanda, kutum, nouver and offin and i dont know what to do with these other than to sell them on marketplace.

My suggestion is, how about it can be exchange into memory fragment or maybe even into caphras or cron stones? Cause in a long run if most players have high gearscore those sealed weapon boxes will be useless and less players will participate to do world bosses.thats my opinion.