I would say to only do it if you live in a busy road or if the sale will be huge. I lived in a street with moderate traffic and garage sales were always slow until I advertised on the paper (We have adds a free section), made the sale huge with two other families and listed thinks like bicycles, air conditioners, lawn mowers, and real expensive items that made people come to see if they are still available. The bike was sold as soon as I opened the door but people kept coming all day long asking about it, and ended up picking up a few things since they were already there.