Well that's a little disappointing. Decided to finally give it a shot and contact support to get back my original WoW account that I used through most of Vanilla. Had my 60 mage on that account, but I stopped using it during TBC and swapped to my current account, don't remember why. I do remember the older account was hacked sometime during WotLK though, and I never bothered to get access back to it. So I finally contacted support, and it was actually super easy to get it added to my current bnet account.
But when I checked, my 60 mage was on a different server and had been levelled to 70, with nothing in my bags but Netherweave cloth and nothing in my bank. I guess the hackers used it as a farming character or something? Was just hoping for some memories or cool things I had banked, too bad. And I was gonna level it to 110 for old times sake, but because I didn't do the 60-70 levelling I don't feel super connected to it anymore. Oh well, mildly disappointing.