I have a lil different take on the Garage sale thing. I held a garage sale last Sept. and threw my items on a table as an after thought. To make this short, I didn't sell any of my scroll saw projects, garage sale people aren't looking for new and unique, they are looking for old and cheap. With that said, It was the best thing I could have done!
One guy was so impressed with the work I made that he has become a regular customer, I have been making scroll saw crosses for him since then. The easy way to put my advice to you is, the more people that see your abilities, the better your chances are of meeting that unexpected someone that will want your talents. No I didn't make a dime selling my items at the Garage sale, but you never know who you are going to meet.
Also at the same garage sale, someone that I don't even remember, mentioned that there was a lil crafts show going on in November at an Storage company. I went, same result, sold one item, but I met another vendor there, she happens to be the director of the annual airshow, the one where the Thunderbird's or Blue Angels appear every year. The show is 6 days long, after seeing my items she invited me to be a vendor at the show, the Airshow starts on March 27th this year. So the bottom line is, it's not always about selling stuff, it's about the potential to show off what you can do to people you don't know! I would recommend that everyone has a garage sale and shows off their stuff, just don't reduce your cost to make a sale, some times you just get lucky! I got lucky enough to turn a garage sale into a business!
Good Luck to you.