African Grey Babies and Eggs for Sale. xxxxxxxxxxx Body length: 13 inches (33 cm) Body weight Congo: 300-550 grams Timneh: 275-375 grams Age of sexual maturity: 3-6 years Maximum life span: 50 years African Grey parrots are a good choice if you like a very inquisitive and intelligent animal. They have a lot of energy and curiosity and are perhaps the smartest species of bird that lives and so will take up a lot of your attention and energy. Because of this, you will need to spend a lot of time with them each day and so they’re not a pet that can be easily left on their own. They are typically around 25 to 35 centimeters and so are larger than the standard pet parrot. Price factor of an African Grey? How beautiful an African Grey looks will affect the price of the bird significantly. African Greys that look healthy and do not have any blemishes or strange marks and features will be more desirable. However, unusual but pleasant looking attributes such as a unique pink or reddish African Grey color