~ Galka, you're doing it wrong. NPC only repairs to 75%, which isnt enough to sell the item. But until you start getting gear in the late 20s or 30s the repair cost is cheap. The hard part, assuming you cannot repair it yourself, is finding someone else willing to do it. I have best results by going to the guild of the class in question and asking the people leveling said trade there. You shouldnt be spending anywhere near the NPCs value in your repairs.
~Ignorance, Fear, and Weakness Go Hand In Hand.~