I was in my local Tesco Extra (Beckton), and I saw a stack (at least 10) of these shredders discounted (upper floor, near the electrical/clothes tills).
Originally £30, reduced to £15, and now finally £6.24. As a comparison, the cheapest Tesco own brand was about £13
The link goes to the Tesco Direct link, where the price is more (double, in fact), so it's just for info.
Can anyone else confirm that this at other stores?