Elder Scrolls titles are on sale at GamersGate and GameFly. Probably due to the release of version 3 of Morrowind Overhaul.
GamersGate / GamersGate UK
The Elder Scrolls V: Skyrim – Dawnguard = $13.97 / £9.07 – Steamworks
The Elder Scrolls V: Skyrim = $35.97 / £20.97 – Steamworks
The Elder Scrolls III: Morrowind GOTY = $7.98 / £5.98 – Steamworks
The Elder Scrolls IV: Oblivion GOTY = $9.98 / £7.48 – Steamworks
The Elder Scrolls IV: Oblivion GOTY Deluxe = $12.50 / £9.98 – Steamworks
Elder Scrolls V: Skyrim eGuide = $13.50
GameFly / GameFly UK
The Elder Scrolls V: Skyrim – Dawnguard = $13.99 – Steamworks
The Elder Scrolls V: Skyrim = $35.99 – Steamworks
The Elder Scrolls III: Morrowind GOTY = $7.99 – Non-Steam (Mods might not work)
The Elder Scrolls IV: Oblivion GOTY = $9.99 – Non-Steam (Mods might not work)
The Elder Scrolls IV: Oblivion GOTY Deluxe = $12.49 – Non-Steam (Mods might not work)
You might be able to stack the 20% off coupon at GameFly if you haven’t used it already. Obviously you want to buy it from GamersGate if you are OK with Steam and want to mod the game.