Came back from poundland a little while ago and i picked up a few computer cables for £1 each. What was so good about them was the fact that they were Belkin so quality cannot be questioned, they came with lifetime warranty and the length of the cables themselves are quite generous.
Cable 1: Belkin Pro Series Hi Speed Internet Modem Cable- Gold Plated contacts- RJ11 Plug/BT Plug- Length 30ft/9.2m Transmission up to100Mbps-Belkin Lifetime Warranty
Cable 2: Belkin PureDATA Series Hi-Speed Internet Modem Cable-RJ11-RJ11-24k gold plating-includes RJ11/BT Adapter Plug-Braided Sheilding-25ft/7.7m Length Transmission up to 100Mbps-Belkin Lifetime Warranty
Cable 3: Belkin USB 2.0 Device Cable-A-B-Printer etc cable-2m Length-Belkin Lifetime Warranty
I havnt compared to any other place, but im pretty sure they cant be this cheap. Because its poundland, an offline merchant, i think its best to say that this would be subject to availability and when its gone its gone.
For more info on these cables, just ask me and ill tell you what the packaging says. Best of luck people.
Edit: Cable 1 on amazon marketplace is £11.90 + P&P & £13.99 from inkandstuff.co.uk