Tesco list this item as discontinued (presumably a new version is now available, but it looks the same) and it's only available in blue.
I know you can get cheaper refurbs from Apple and used items from Amazon etc but I can't find a new unit any cheaper than this.
Obviously if you want it delivered you'll have to pay the delivery charge, I ordered mine for collection in-store. As no-one now lives more than 30 feet from a Tesco, it's not much of an inconvenience!
Note - it comes up a few pence higher than my listed price as the new VAT rate is taken off at checkout.
Hope this is useful to someone