Sign up to Sainsbury's via Quidco.
You will get £10 credit from Quidco for buying from grocery section of the site. Four of these ten pounds can be used on your shopping while the remainder £6 is used for delivery charges!
The Ferrero Rocher's cost £5.31. So, £5.31 plus £6 delivery minus £10 quidco = £1.31
As you would have already established...almost anything you want with either £4 off OR anything under £4 for FREE!
...delivered at a time that suits you!!
+ you can also earn nectar points!
Quidco terms: For a new customer registration and purchase via the grocery section of the site. A new customer is defined as someone who has not purchased groceries online within the last six months.