Black and luggage are neutral colors that are very popular. Some forum members have seen the black or luggage on sale, but I personally have not. They are much harder to come by at a sale price since they are already snatched up at regular price. Keep an eye out on the deals thread. People will update it as bags go on sale.
Also, if you are looking for gold hardware in particular, its very hard to come by. They currently have a navy color with gold hardware. I really wish they would make more gold hardware. It looks so fab on this bag! But other than that, I don't know if they are bringing back luggage with gold hardware. Sorry I can't be of much help there.