Gift certificates worth $25 for only ten bucks!
A large selection of gifts under $10, from silly to serious.
52 Deck Cards
52 things to do in the car, 52 ways to simplify your life, etc.
Freecycle - A grassroots and entirely nonprofit movement of people who are giving (and getting) stuff for free in their own towns. It's all about reuse and keeping good stuff out of landfills.
Paperback Swap - Swap, Trade & Exchange Books for Free