I was looking at these on Amazon and thought it was a good price for 9 packs at £7.48 (they're usually about £2.50 individually though ofcourse you can get multipacks for cheaper in boots tesco etc usually about £7.50 for 6 packs) but then noticed they offer a "Subscribe and Save" option near the basket, where you can select to have the item automatically re-ordered and delivered (for free) at a frequency to suit you (ie every month, 2 months etc) AND you get a 10% discount every time for subscribing, making it £6.73 for 9 packs.
There is no charge for the service and delivery is always free. Apparently you can cancel at any time.
These are my wipes of choice by a long shot so for me this is really helpful knowing I'll always have a good stock and always at a good price! Hope this helps someone else!