We manage to buy the tickets for 400 000 thousand Roopie per person. Some peope paid more than 1.5 million so it is a good deal. One of us decided not to get up à 2 am to see the sunrise. In my opinion he missed one of the most beautiful sight on earth.
Expensive but great treck in Indonesia. According to others, the best volcano to climb in the country. It is worth the price, since we were providing with every meal and the material to sleep, we didn't have to bring anything except for fresh clothes.