I have been using Craigslist for years. I have purchased both large and small items. Be very careful when choosing an item and do not communicate through the site. If the seller is not willing to speak with you by phone be very wary of it.
Craiglist is a good site that provides a free place for people to exchange goods or services. Since removing their adult services area it has cleaned up its online transactions. This does not mean that there are not scammers that take advantage of the free posting, but that overall the site is a good site.
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craigslist provides local classifieds and forums for jobs, housing, for sale, personals, services, local community, and events