PROFIGOLD optical cable (good brand)
I wouldnt touch the £3 cheapo cables you find. Had 1 and it fell to bits. I definatly recommend PROFIGOLD cables. So this is not a good deal for those who like to buy cheapo cables. But a good deal for those who like a little bit of quality.
Usual price over £30 in a shop
Other online places over £12 (cheapest ive found other than play.com)