Which 7950 to Buy and Where?

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So, I'm planning on buying a 6x 7950 rig for scrypt mining, but have been largely unsuccessful in finding retailers to get these. Could anybody direct me to a site that sells 7950s that reach good hash rates for a good price (under 280$ each ideally, will live with 300$) that have 6 in stock? A direct link to a specific model would be preferred. Thanks.