Refurbished: Dell Optiplex 3040 Small Form Factor SFF PC – Intel Core i5-6500 Skylake 3.2GHz 8GB 500GB HDD DVD/RW - Windows 10 Professional - Newegg.com
Refurbished: DELL Desktop Computer OptiPlex 3040-SFF Intel Core i7 6th Gen 6700 (3.40GHz) 16 GB 512 GB SSD Windows 10 Pro 64-bit - Newegg.com
Amazon.com: Dell OptiPlex 3040 Small Form Factor PC, Intel Quad Core i5 6500 up to 3.6GHz, 16G DDR3L, 1T, WiFi, BT 4.0, Windows 10 Pro 64-Multi-Language Support English/Spanish/French(Renewed) : Electronics