This has propped up a few times on the forums. Last spotted it here and here
And it makes a lot of sense. I mean, the dungeon tonics are tradeable. The people that don’t want those simply offload them onto the trading post for next to nothing to give the people who do want them the chance to use them.
As I said on one of the threads, even if it couldn’t be put on the trade post and you could only give it away by mail, I would much rather give it to someone who would appreciate it, rather than begrudgingly keeping it in my bank where it takes up a precious slot.
It would be great to get a response from the Dev team on this =]