Exactly it is important to realize that the K712 is even 3x more expensive (in Europe).
For $200 (same price for us Europeans) you're getting a hell of a headphone.
I still regard it as the best sounding headphone in the ~200$ price range. Neutral reference class that is.
Sure it's not perfect, but I don't feel like I am missing something which is impressive. It's also a great all-rounder.
It is also, however, very revealing and a bit picky! That's something people don't expect in that price range.
In case of K612 I wouldn't be ashamed to pay even 300$ for it... I think it absolutely trounces over most of the headphones <400$/500$.