I have note had any personal experience with Webstore.com but we have a fairly recent thread discussing about this site as an eBay alternative. The last post is by a member who has actually tried selling there.
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Also, for more eBay alternatives you may refer to this post - Link hidden: Login to view
Two notable alternatives to eBay would be Addoway.com and Bonanzle.com
Hope this helps. All the best!