Hi A.,
If you decide to do a garage sale, I would say advertise like crazy!! People will come, but they have to know you're there!
Another option, if you decide against a garage sale, is Z..com. We're an online marketplace for parents to post their gently used kids' gear (including car seats, strollers, and clothes). We use a points based system, not dollars, so the whole thing is FREE. You just join, take a picture of your item and post it with a description, and you assign a point value. Then, other members can take a look at it and use their points to "buy" your items. You can choose to post your items locally, so you can meet with the other user and exchange the items, or you can choose to ship the items (great for clothing). If you ship we have a built in FedEx tool that allows the "buyer" to pay so you just print a label from your computer and send it out.
After you "sell" your items, you can use your new points to get something else from our database, or you can donate your points to a local charity.
If you're looking to make money from your items, this isn't the best plan for you, but if not, please check out www.Z..com!
Whatever you choose to do, good luck!!