Recently I started buying replica sunglasses. Work just like the real thing and a fraction of the price. Worth it especially for sunglasses that I have to replace every year. I'm thinking of trying to pick up some other accessories like belts next.
One other interesting thing about reps is it feels like they provide the most utility to those who can afford but don't want to pay the full price. If you are a kid decked out in full designer gear, people will call you out. But if you mix and match with some real pieces, people will just assume they are all real.