The highest price paid for an egg was £1,000.00 pounds Sterling for an egg of the extent Aepyornis maximus

Aepyorni maximus was a giant, flightless ratite native to Madagascar and has been extinct since at least the 17th century. It was the world's largest bird, believed to have been 3 metres (10 ft) tall and weighing close to half a ton – 400 kilograms (880 lb). Remains of Aepyornis adults and eggs have been found; in some cases the eggs have a circumference of over 1 meter (3.3 ft) and a length up to 34 centimetres (13 in). The egg volume is about 160 times greater than a chicken egg.