Individually these are about 54p each which gives you a saving of £3.40! It makes them less than half price.
Seems a bargain to me only 20p each.
EDIT: thanks to jpieter, it does appear to be online too. Link now added - direct link not working but it is under Dairy, Milk & Eggs: Chilled -10 For £2 (8/7/2008)