Finally got Shadowmourne so I have the following items:
Reins of the Crimson Deathcharger - USED; UNAVAILABLE
Note: Warfire is selling cheap Deathchargers on Alliance side. Contact him if you want one!
Muradin's Favor - ON RESERVE (Not for sale... Yet)
Tabard of the Lightbringer - SOLD; UNAVAILABLE
Sylvanas' Music Box
If any above say "UNAVAILABLE", then the item has already been sold and/or used, implying they're soulbound to that character and not available to sell.
"On Reserve" means I'm holding it for someone for the time being. Status will change if the item is unavailable.