Generally anything less than £1/MB for a Micro SD card is thought to be pretty good, but this Lexar class 4 16GB Micro SD card comes in at 63p/MB i.e. £9.99. Not too shabby at all, mes amis.
Play reckons 16GB equates to 4,000 songs or 48,000 photos. Depends on bitrates and what have you, but those figures’ll give you a rough idea.
(Thanks to parkodrive at HUKD)