There a special deal right now where you can Pick An Item For $1 at ThinkGeek. Just spend $50 and you can buy one of the selected gifts (with value of up to $19.99) for only $1.
To save just go to the $1 Gifts section at ThinkGeek. Select one of the $1 gift items, such as Star Wars Geeki Tikis, a Zombie Bowl, Jabba the Hutt Mug, R2-D2 Stocking, Magnetic Hour Glass, or Star Wars Lightsaber Light, and then enter ThinkGeek Promo Code LUCKYBUCK. Finally, add $50 worth of merchandise to your order to get the gift valued at up to $19.99 for just one dollar.