Y'know, I actually recognized those boxes. Before getting into magic and playing cards, I used to play collectible card games, primarily Magic: the Gathering and Decipher's Star Wars CCG. I had like six or seven of those to house my entire collection in. I'd practically forgotten they exist until you showed us that photo.
Looks like I might be hitting up my old collectors' shop for a few of those - they'd be perfect for holding sealed decks and give me more room for unsealed ones in my shelving unit.