Cheap tricks

I was doing my weekly shop yesterday in a major supermarket chain, heavily promoted by Mr Oliver.
Looking, as usual, for the obvious food bargains cleverly placed on all the main aisles. I tracked down my old favourite, a pack of large king prawns, seductively reduced again to £2.99. Then it dawned on me that I'd been paying this almost every week for the past two years, bar the odd week when it was back to its original price.

Surely then, they should place this particular item in its own cabinet with the sign "For one week only, double the price".

Watch out for those chicken pieces too.