No AGAIN this is incorrect, not sure why you dont just google it? There are NO requirements to buy the boxes. Please stop spreading misinformation out of an egotistical need to be right, just accept youre wrong and correct your comments so you dont confuse people.
" In “The War Within” Season 2, Champion gear can be purchased with Valorstones from Agmera in Dornogal, with no rating or progression requirements. This makes gearing alts significantly easier and faster. The Undermine Equipment Chests, costing 325 Valorstones, contain Champion-track gear, specifically item level 636"