ONLY disenchant an item if you don't have that enchantment in your list already. Disenchanting reduces the value of the item.
On the whole I couldn't be bothered to figure out the details so I just disenchanted everything before I sold them - then again I was never short of cash, and I really didn't want to spend hours micro-managing my inventory.
But that gives an interesting question - you can farm Tom, Dick and Harry for reagents and sell them for cash if you're broke. I wander if it would be better to use the reagents to create enchants, then sell the enchanted items? E.g. would an item with level 9 (non malachite gem) enchants increase in value more than the cost of the reagents it took to make the enchant? Especially if you have your enchant platform fully upgraded?
