These were £20 before - I bought them when they were reduced to £10, but they have now been reduced to just £5!
They had loads in both my local Sainsbury's stores so assume that this is a nationwide deal.
Link will take you to the same item from Amazon's website.
The Salter Electronic Bathroom scale has a compact minimalist design, made from a white durable plastic. The great thing about this scale is that it can be used not only on hard floors but on carpets as well, just by fitting the feet that come with the scale. It has a high capacity of 150kg / 23st 8lb / 330lb working in graduation of 100 g / 0.2 lb and has a large easy to read display. It is powered by two Lithium CR2032 batteries. The scale is covered by a 15 year manufacture guarantee.