Less than 30p each from Bluepoint.
Careful, those cheap ones are CCA cables from Bluepoint, not copper.
Yes they are clearly marked on their site they are CCA cable. It would be down to the knowledge of the end user whether they use them or not. Quite a bit of cabling in our place is CCA and although we've yet to have a problem, it wasn't specified by us and we certainly wouldn't choose it + we've asked the people involved not to use it in future.