Geek Gifts to Avoid: Gift Card Puzzle Vault
Stores are full of various types of gift card packaging that can range in price from $2 up to $10 or more. That means, after you buy the $20 or $50 or whatever amount gift card for the person, you then drop some more money on a "holder" for that gift card. One example is this Gift Card Puzzle Vault that makes the recipient work for their present -- moreso than simply tearing into some wrapping paper.
Image courtesy ThinkGeek.