You might wonder how to tell the good saffron from the bad safflower, why some threads costing three times as much as other 'saffron'. Well, as with many expensive food items, besides the quality, you also have to question the authenticity. It takes at least 100,000-200,000 threads of saffron to make a kilo, which sells for anywhere from 3,000-6,000 EURO. It's the most expensive spice in the world...During the pandemic of bubonic plague a war ensued called the 'Saffron War', it was so valued as a cure for the suffering that stocks in Europe were depleted and more was ordered from the East.