The original airport express with airtunes is at pc world for on £15! I use this to add on to my network as it has audio out and usb which makes my printer wireless and the audio can go into your hi-fi meaning wireless music from the computer to hi-fi.
Such a useful little device for the music and printer option, and it's a wireless router too! Makes a great portable router for travel, and for £15 it isn't a lot considering
RRP Was £59.99.
In store collection so if you're going by worth popping in for a check.