Unlockable emotes?

I was thinking today that it would be cool if you could get other unlockable emotes. I know rank gives you some, and that's pretty cool, but what if you could get some by doing different quests or just purchase them for gold.
I think it would be cool if you could maybe buy special dances for characters. Just being able to buy the dances for other classes would be neat.
What do you guys think?

Having my Ranger do the Necro dance would make my life perfect.

They should have those in the collector's editions so people have an incentive to buy those.

It could also make a great gold sink, having unique dances or emote that you have to pay alot for.
The CE already have a unique dance to them.