Refurbished: Dell Optiplex 755 A Grade Desktop PC with Intel Core 2 Duo 2.66GHz, 4GB RAM, 1TB HDD, DVDRW, Windows 7 Professional 64 Bit, Microsoft Authorized Recertified Desktop PC w/1 Year Warranty
CMS 4GB (2X2GB) DDR2 6400 800MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 755 Dt/Mt/Sff - A90 at Amazon.com
Used Dell Optiplex 755 3.0GHz C2D 4GB 500GB DVD Win 10 Pro Desktop Computer - Walmart.com