That tabard will sell for alot..
Gratz if your guild already got an extra reward btw!
meh im glad they didn't make the items bind on pick up. as palpahtine stated, yes the person with shadowmourne may have provided the primordial saronite, but most likely they weren't the only one getting shadow edge. if it's boe and it's all going to one person, i think thats a bit of a kick in the face towards the rest of the guild who the shadowmourne wielder raided with throughout 3.3. also, only three classes can equip shadowmourne, so yeh, if it were bind on pick up, i don't think blizzard wanted to make stuff only a couple of classes can get (which has aesthetic/novelty value)
my 6am ramblings there.