We bought two very big amaryllis bulbs in the Flower Market in Amsterdam when we visited in December. The bulbs where more expensive because the flowers where going to be purple. My husband warned me at the time that I had no way of knowing the colour. My husband was right, the bulbs now have pink flowers.
So, just to let visitors know that it is not worth paying more for bulbs when you do not have any guarantee of the colour
Very disappointing, but these guys at the flower market are on to a good thing with tourists.