Argos? Local supermarket? But why would you want to?
Spend the most you can or it's just a false economy imo. Unless of course you don't want them for bedtime.... then Morrisons or the like do 2 for about £3
need cheap just now as i dont get paid till next week and there has been a lice case at the wee ones nursery so was gonna do her hair and get new pillows just in case.