its most likely a guild bank
If that's the case, then why would like two bags be filled with random BoP gear that I'm assuming is the mage's shit he doesn't keep in his bags with him? That's not usually the type of thing you find in the guild bank, I don't think. It just would've been DE'd by then. And of course, maybe instead of having the guild bank on a separate level 1 character, maybe they just had it with some random character in the guild instead. That would account for why the bank is half shards/random other mats in large quantities, and half what appears to be his old gear and random other personal shit.
But still, 22,000g! Or maybe that's the guild bank's funds. But man, it's weird to trust your entire guild bank, items and gold included, with an actual level 60 character, and not an alt on the guild master's account or something. If he transferred, or like, quit the guild, they'd be pretty fucked!