For a 15ml spray of Vicks Self Defence
Boots price - £6.55
Asda shelf price - £3.50
Asda Checkout price - £1.50
Purchased one yesterday in Doncaster Asda, and after checking receipt saw that I had only been charged £1.50p.
Been back today and purchased a further 3 for the family - again paying just £1.50p each.
I see that the item is no longer listed on asda.com, so maybe they are just selling them off cheap.