So please, let's remind that taste is key. You can make a very stylish statement without ruining yourself. Of course you cannot compare a Lanvin dress to an Old Navy one, that's not even questionnable. What I mean is that the minimum is to understand the idea behind a garment made by a designer. For instance, if a skirt looks radius down the runway, it's 50% of the garment, and 50% of the understanding and of the styling.
Here are some example of high priced disasters, and "affordable exquisit look":
Even a 2500$ Hermes bag couldn't do anything for her...
Chanel shirt 350$
Hermes handbag 2500$
Alexander wang skirt 250$
Total: 3100$
Just a question of styling... Voila:
Forever 21 cardigan 120$
T by Alexander Wang tank 50$
Target sandals 50$
BDG for Urban Outfitters jeans 80$
Total: 300$