I stumbled across this deal in Boots 2 days ago (apologies for the delay in posting!). They are doing 3 for 2 on Alpecin Caffeine shampoo and if your missus has a Boots card (are blokes allowed them???) then there is a 25% off shampoo voucher at the moment out of that pink ATM thing, but it only comes off ONE bottle so net result is £5.49 + £5.49 - £1.37 = £9.61 = £3.20/bottle. 3 for 2 on most/all shampoos, etc, and includes the other Alpecin options so knock yourselves out! Happy hair growth chaps!