I picked up Skyrim in a sale at the end of November from Gamefly.co.uk for £7.99 (about $12.50), the same time it was on sale on Steam, so picked up some DLC too. Haven't seen it as cheap again yet, even at Christmas.
Mind you, I still haven't started it thanks to the sales. May wait till I built a new rig anyway, see if I can max the settings and install some shiny gfx mods too.