Playing the game, I have accrued large numbers of items that I personally have no use for, but I know other players do. Clearly, the ideal solution is to use the Trading Post to sell them; if no buyers, I could at least make a few coppers from an NPC trader. Sadly, being account bound, I am stuck with these. There are two key groups here: gem store items (eg boosters) and ascendant materials.
Every time I get my daily, monthly, open a Black Lion Chest or get an Achievement Chest, my inventory is filled with junk I will never, ever use. Boosters, Bank Access, etc. I know there are players who love these kinds of things, but I am not one of them. Why can I not trade them as I would a fancy weapon?
The new ascendant weapons now mean my inventories are getting clogged up with dust, stones and other materials I cannot use. I have no interest in farming up all the materials required, and I do not do Fractals so the effort would be a waste anyway. There are MANY more players who want BIS weapons and would love to buy rather than grind, so why make these things account bound?
Honestly, if I could make one copper for every item I sold, I would be happy :P