it is true that Black truffle is expensive than gold. We call in our language black gold. Recently, i bought fresh winter truffle ..............i paid 9 thousand HK dollar for KG. This is season of truffle now.....specially winter truffle have very strong smell. IN cooking you just use a little bit of truffle but u also add truffle oil. I love truffle oil man......i can live forever in smell of truffle. I have also made truffle menu..from starter to dessert it is truffle. I sold that menu for rich guys.....who come to my rest.....i sell that menu for 890 HK dollar per head. Bro...sad man i am in lanteau, hong kong