The problem is cost......
The bottom line is the bottom line on this. Sorry, I will not pay thousands of dollars for an outfit or a chair or what have you.
Now in general, I don't buy knock-offs, because the designer items are usually ugly or uncomfortable. I generally like a lot of non-designer items better anyway, so I will save my money and use it on going places, doing things. After all experiences are one thing that can never be taken away by flood, fire, etc. Things like this can and quite often are destroyed by various events in our lives.