My second instore deal today. Maybe worth checking your Sainsburys for these too, I found them in the Didcot branch in Oxfordshire.
Three options for buying these phones...
* Pack of 1 = kx-tg2711 = £12.49
* Pack of 2 = kx-tg2712 = £19.99 (although my receipt says £20)
* Pack of 3 = kx-tg2713 = £29.99 (Member Dealtime had these scan at £25.99 in one store so maybe worth checking).
If you compare these to Amazon prices today, the single phone is £18.99, the pack of 2 is an extra tenner at £29.99 and the same difference for the pack of 3 at £39.99.
Seem to get good reviews - http://reviews.sainsburys.co.uk/2678-en_gb/124941970/reviews.htm