Used Apple iMac 21.5-inch 500GB Hard Drive 4GB RAM I3 Proessor (Mid 2010) - ZD Laptop Service Centre
Apple 21.5" iMac® with Retina 4K display Intel Core i3 (3.6GHz) 8GB Memory 256GB SSD Silver MHK23LL/A - Best Buy
Refurbished: Apple Desktop Computer iMac MC978LL/A Intel Core i3 2nd Gen 2100 (3.10 GHz) 4 GB 500 GB HDD AMD Radeon HD 6750M Mac OS X 10.12 Sierra - Newegg.com