If you are doing it expecting to make a fairly good amount of money, you need to have several fairly big ticket items...furniture, appliances, etc. that you can sell for more than the usual $1-$5 (and mostly under a $1) garage sale pricing. Also if you consider it an estate sale, you can usually get by with pricing things as much as double or more what you would for a garage sale. Then have things at half price on the afternoon of the second day.