In-store at Sainsbury's Warwick - 2 for £5 on the entire Johnson's Clean and Clear range.
Since most of these products are £3 or so each, you'd say this deal is not that hot. However it includes the 'Advantage Quick Clear Spot Treatment Gel'. So you can buy one of these for £4.49 if you like or 2 for £5. You won't find these for less than £3.99 anywhere else either so 2 for a fiver has to be worth posting.
I have perma-stubble (thanks to a Babyliss beard trimmer I found on these pages) and ingrowing hairs are a zit-nightmare. However this stuff sorts them out pronto.