I think the eBay one is a much better deal, and although I do believe one of our members had a really unpleasant experience with them on a ring, a necklace should be pretty easy, and the pictures look like they did a nice job. Were I buying it though, I'd want to see a picture of the back of the bezels though, I hate it when it's just metal around the girdle without a solid back so the stones don't flip as bad.
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Equal Opportunity Bling Lover!