Since the previous thread got locked up months ago, here’s a new one.
I gotta admit, my Shaman is right now sitting with both left and right part of
in her bank, and the reason I haven’t committed to it is because I really want my Paladin Blacksmith to be the main char for eligible legendries. He have farmed Molten Core for far longer and still only got half of the bindings.
an old bow from vanilla Zulgurub, the snake one, can not rember the name, and a voodo token atleast that I can recall having still in bank.
On my Shaman, along with various unobtainable items on my Hunter.
Probably the Haunted Memento
got all the original character starter shirts.
https://classic.wowhead.com/item=6125/brawlers-harness#comments etc
Got this on my horde hunter which I no longer play 
Have you taken the half to Silithus to start the quest so you are able to have the 2nd binding drop for your Paladin?
I have something very few people have in their bank
Free space 
I’ll have to take a look at what’s in Bauldie’s bank later since he is a bit of a vanilla/TBC time capsule. But I did check my original vanilla rogue recently and discovered that I still had these:
My original hunter main still has this in his bank too, along with the Sweet Tea from the reworked version of the quest.
No. Does having both on one chars lock the possibility of further drops on other chars?
I am sorry my bank is empty as of now 
My classic priest got a Dark Whelpling while leveling in Dustwallow Marsh a year ago. Was thinking if I should AH it, but ended up using it myself. Its price is a whopping 3.5k gold… a fortune in that game version.
She also has a Scarlet Crusade Tabard (no idea if still obtainable or not), and a Brilliant Wizard Oil - which is special as it was a spellcaster weapon oil in Vanilla, but much harder to get in TBC as the recipe requires the Zul’Gurub raid rep and high end mats as well. So has a price tag on AH, but an oil can be easily received from a Terokkar Forest quest.
…but honestly, only that whelpling is a truly rare thing. 
Tigerstrike Mantle
And some Black Rogue Mask that was once really sought after.
Thats not rly branded
Obtained during Wrath, only one of many things that are not available anymore.
I did check and realised I don’t have a lot of rare stuff left
Best I can do is a Light of Elune on my Priest…
Edit: Also found a Mr Chilly and the smol Baby Blizzard Bear
I don’t really have things that are not available anymore. As far as rare stuff goes, it’s probably the rare fish my fishing alt caught, Old Crafty, Old Ironjaw and Steelscale Crushfish. I assume just not many people care to try and get those.
All 8 original pieces of the Feralheart Raiment (Dungeon 2 set for Druids) on retail server 
Haunted memento in my bag, the lvl 70 brewfest trinkets, ruby shades and wotlk pre patch argent dawn gear
That Arena grand master trinket
I remember waking up at 3 o clock in the morning to try to get to the STV arena chest while others were sleeping.
I managed to get it during TBC as a level 40-something while having to avoid all those pesky level 70 bullies and the twinks they were boosting.