Unused karma weapons/armors
this will never happen. you can buy items at level for karma grind more karma sell but a new set at level 30 sell at level 40 and so on. you would always have the best items once you got the karam.
I agree with you chucky, but I think we should just be able to sell the karma gear for at least a little copper or salvage the pieces for some materials.
Rikusuke@Crystal Desert
You have a second option for your karma items:
Transmute them in the Mystic Forge.
All you need to do is save up four of them of the same rarity (or sacrifice a few non-soulbound or salvageable items to complete a set of four).