The sites first goal is to help you find items that are within easy range of your house. Other sites, or classified sections don't help you plan out your route. With this new map, you can zoom in and out, just like you would with any google map.
Post your sale for all to see, and don't forget to upload images so people know what you have.
You'll also see that you can auction some of your more valuable items. Being able to auction items gets you the best price, and by being local, bidders can see the item at your garage sale.
The map works like any other Google Map. To see the sales near your home, use the sliding scale on the left to zoom in and out.
Once in your neighborhood, click on a 'marker' to get more information about the sale.