It is indeed sales of MW but it does not really matter for someone buying it for his playskin for very long time and also it's almost impossible to spot difference when playing in-game tbh. It is STILL roughly 842 $ compared to float prices. It's actually madness. It's not any financial advice, but do with this information what you want.
PS. This same behaviour applies to almost any other nice playskin currently listed on float. So beware what're buying right now.