I am not into selling, but based on my visits on the aforementioned websites, they're actually good options. Why not use them all together? Also, add craigslist, backpage, classifiedads and ebayclassifieds. I know these are general sites, but they also have the most users.
---Patrick Meyer - C-level Advisor, Business 3.0 Thought Leader & Keynote Speaker. For more info, visit at http://www.patrickmeyer.com.