Obviously not a product for everyone, specific to the PRS-300, however this is the cheapest price I can find in the UK on a cover that is ridiculously overpriced at £29.99.
Even cheaper if bought at Amazon Marketplace (however those deals are not allowed on this website) Advanced MP3 Players through Amazon offer free shipping therefore its only £9.99 delivered through there!
However, as far as HUKD allowed posts go, this is STILL the cheapest price in the UK I can find on this cover even at £11.86 direct through their website.
£9.99+£2.49 Delivery use code MVC5 for 5% off for £11.86. + 4% Quidco Cashback
Or just order from Amazon Marketplace for £9.99 Delivered.