Garnier Clean Detox Anti-dullness Foaming Gel (200ml) 55p @ Superdrug

This looks like the disposal of an end-of-line product.
eBay and Amazon charge £3.89 .
There were lots and lots of products on offer in the skincare section. Even if this one is sold out in your town, everyone should be able to find a good deal on a similar product they like.