Here is an interesting article on the rise of the garage sale as a response to higher commodity prices. Here are the top things people are selling on Craigslist:

1. cars/trucks
2. furniture
3. electronics
4. baby/kid stuff
5. motorcycles

And here is a graph (courtesy of Gigaom) of how garage sale listings have increased as well. I should note that I have also noticed many more garage sales here in Connecticut where we call them tag sales or yard sales.