Argos has this Universal BT28VM Bluetooth Headset for £12.99
Cheap option if you are looking for one. Reserve online and collect @ store. Compatible with Sony Ericsson, Motorola, Nokia, Siemens, Philips, LG, Samsung, Panasonic and Sharp mobile phones.
Features: Version V1.2 | Talk time - up to 20 hours | Stand-by time - up to 360 hours | 10 metre range | Volume control | Over ear design | Can be used on left or right ear | Battery operated | Call answer | Call waiting/put call on hold | Volume adjust | Vibrating call alert | Last number re-dial | Weight 25.8g