Kopi Luwak apparently taste like no other coffee and comes with it own Certificate of Authenticity!
Originated from the Indonesian island Sumatra, the luwaks will only eat the finest coffee beans available which it then excretes! The still intact coffee beans are then separated from the stools and cleaned, roasted and grounded like normal coffees.
Whoever thought of making coffee from this is clearly adventurous but the concept worked. A cup of Kopi Luwak coffee cost between $300-$600 and you get a certificate to go with every cup of Kupi Luwak coffee.
Whether it lives up to its legendary status as one of the finest coffee in the world, that depends on individual tastes but the price is worth paying if only for the experience.