I thought this was a pretty good deal and is the best price around at the moment.
Get the Black Ice Air freshener for half the usual price at Tesco. Pick one up from in store or at the garages to freshen up your car.
Think it only applies to Black Ice but there could be others.
Focus DIY charging £3.99 for just one! (http://www.focusdiy.co.uk/invt/197352)