Good news for psp users who usually suffer with the high prices for memory stick duo cards in the UK.
head over to
http://www.picstop.co.uk/PSP-Memory
and have a look at their relatively low prices
most notably sandisk 4GB: £38.90
and sandisk 2GB £17.99
they are very reliable, usally delivered within two days, though unforunately you have to pay postage. a minimal cost when the average price for a 2GB on the highstreet is £50.