The story is weird from the beginning:

Chinese skins-selling platform Buff has reported a costly purchase.

The player has purchased a skin that is usually not being sold for a high price. The 

The player bought a Wild Lotus skin AK-47. But at a price equivalent to $160,000. Usually, the Wild Lotus is sold on the site for several thousand dollars.

As you already may have understood from the header – the point of interest was not the weapon skin but the stickers on it. These stickers cost more in total than the skin itself.

However, there were more expensive items on this market. Right now an AK-47 with a Case Hardened 661 skin and four Titan Esports holographic stickers from EMS One Katowice 2014 are available at the marketplace. Unfortunately, the owner is asking $400,000 for it.