Any repair shop can reveal the quality and condition of your equipment. Condition percentage reported is the current condition of the item. When that reaches 0%, you will need to repair your equipment. Quality however is a description of the overall durability and the damage it has taken. Some equipment is built with a very high quality and some has magical enchantments on it to protect the quality. Other equipment over time, battle and repairs will wear thin and become eventually unrepairable. The quality reported by the repair shops will give you an indication of what quality new items are when aquired, and it will also indicate when they are failing, or soon to become useless.