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A-Tech 16GB (2 x 8GB) RAM for HP PROBOOK 6560B (A13) | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com
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HP ProBook 6550b 15.6" Widescreen Laptop - with Intel i5-520M 2.4GHz, 4GB RAM, 128GB SSD Hard Drive - Windows 7 Professional 64 - Used with FREE 3 Year Warranty provided by CPS. - Walmart.com
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Hp ProBook 6560B 15.6-inch (2010) - Core i5-2520M - 8 GB - HDD 750 GB | Back Market