[deleted account] ( 1 mom has responded )
I use www.craigslist.com to find many things. It is basically an online, local classified listing. There are many categories set up, and many many things listed. The first time you go to the site, you click your country, state/province, and closest city (s) to you.
There is nothing regulating how much a person sells something for, or anyway to log their record, such as ebay has, so you need to be sure of what you are purchasing before you buy it.
There are many categories to choose from, even a free and wanted category. I have found many things on the website and met up with local people to sell and buy my things.
You can even advertise for a rummage sale, and the sign up and listings are FREE.