If you’re wanting to buy or sell something without dealing with auction sites like eBay, Craigslist is almost always a good way to go. It’s easily one of the most popular sites for advertising your wares, likely because it doesn’t cost you a dime. The only downside is that it still looks like the site is trapped in the 90’s. If you’re looking for a better way to navigate the site, you might check out Allofcraigs.
Allofcraigs is an interesting search interface for the popular classifieds site. Unlike the regular site, you aren’t limited to searching in one specific city. Instead, you can select entire regions. You can then break down your search into specific categories, so you can find exactly what you’re looking for. It still might not be the prettiest site to look at, but it does give you a more robust search feature.