Hi everyone, I'm noob so please excuse my ignorance but does anyone know why I would not be able to exchange irregular tombstones or lore? I am at the vendor and I have enough for what I want ( a mount) but when prompted to trade the trade button is greyed out! I have googled and I can't find anything.....apparently I should be able to exchange even when the event is not on, I just can't get more of the tomes?