I live in a larger city where our warm weather a good part of the year makes garage sales quite popular. A good friend of mine and I hit these sales almost every Friday morning. It is fun to visit and look for our hidden treasures among the "trash".
This same friend has garage sales twice a year. She goes to other sales, buys items she finds at really low prices and that she knows will resell for more. She cleans them up, packages them and puts them in her semi-annual sales. At her last sale she sold $900 worth of items. Her sale lasted all day Friday and Saturday. It is a nice way to bring in a little extra cash every now and then ... as long as you enjoy hitting the garage sales yourself.
My oldest daughter and her new hubby have begun hitting sales themselves on Saturday mornings. She recently purchased a 1940's wooden Dial-a-straw dispenser for $3.00, which then sold on Ebay for $86.00. Of course, not all garage sale purchases will make this type of a profit, but occasionally they are to be found. Above is is 1950's girls' dress pattern I found at a church rummage sale for 25 cents. It is for sale with two 50's doll patterns in my Etsy.com shop, Myfancy55.
I and my friend don't buy everything to resell. There are great clothing buys for our families, as well as housewares and home decor items. Why buy a hand mixer for $20 when you can pick up a nice one at a yard sale for $1?
For some of us shopping yard sales can be therapeutic. I enjoy just getting together with a close friend, talking, shopping and rejoicing with each other when we find a treasure.