That bizarre-o Amazon thing is happening where the cheapest seller keeps changing, but you can currently grab this Micro USB cable via Postal Phones for 79p.
EDIT: Something mental is going on with the linkage. Click "31 new" then choose Postal Phones.
Advertised for BlackBerry, but fits various phones. Have a gander at the Amazon listing for more details.
(Thanks to elephantguy at HUKD)