They closed their doors ~1 month ago.

Here is the closing announcement: https://www.reddit.com/r/DarkNetMarkets/comments/7il24c/so_long_and_thanks_for_all_the_fish/

---

Btw, be careful to not link scam mixers. I have heard many users saying that Fog is selective scamming. Also, they have a unresolved accusation about stealing 998 Bitcoins since 2015 and a lot of recent complains in their thread: https://bitcointalk.org/index.php?topic=50037.600

Edit: PrivCoin is also listed as "PriceCoin".