Reduced at Tesco Upper Boat, near Pontypridd are these
Sennheiser OMX 181 Stereo Earphones Flexible Ear Hooks
They're £32 online but you can get them on other sites for around £15.
They are near the click and collect desk and there's about 20 sets left at the moment..
Probably store specific.
Link added for product comparison - HUKD