If you're a big Elder Scrolls fan, one of the best companions/collectibles you can buy is The Skyrim Library book set. Right now, The Skyrim Library is on sale for $54 at Amazon, down from its list price of $105. The set consists of The Skyrim Library Book I, Book II, and Book III. All three volumes are hardcover bound, and the set comes with a gorgeous slipcase featuring unique dragon artwork.
The Skyrim Library volumes compile in-game texts and include beautiful illustrations--ranging from items to character art. Book I is called The Histories, Book II is Man, Mer, and the Beast, and Book III is The Arcane.
If you're not getting it yourself, the Skyrim Library book set would make for a great gift.