If you're looking for a venue other than eBay in which to buy, sell, or trade clone brand elements, you might want to visit The Bloks Forum at
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The forum has a dedicated Marketplace group to facilitate transaction involving primarily non- LEGO construction toys.Drop by if you have the time and interest. In addition to being a (very basic, admittedly) trading venue, there's a wealth of knowledge and experience with a range of clone brands, so if you have any questions you'd do well to ask them there.
Dave!