First post, so be gentle...
Blister packs of 3 or 5 x 8cm DVD's. Light Blue packs are DVD-R (8x write speed) and Dark Blue packs are DVD-RW (2x write speed) - all slashed from £3.99 to 1p - yes, 1p - even the checkout girl double-checked it!
These discs store 1.4GB of data or about 30mins of film if used in a camcorder.
Not sure if store specific or everywhere, but hopefully others will benefit from this.
This was at my local Tesco Superstore (Coventry Arena).this morning (11 packs for 11p)
These were located on the end aisles, with batteries, 35mm films, etc