Apple iMac 21.5" All-in-One Desktop Computer i3 3.07GHz 4GB Ram 500GB Mac OS High Sierra w/ Keyboard & Mouse - GRADE B
Apple iMac 21.5" A1311 -i3 2.5GHz 4GB Ram 250GB MacOS High Sierra (GRADE B) | eBay
Apple MC309LL/A 21.5 inch iMac Core i5 2.5 GHz 4GB RAM 500GB HDD Mid-2011 | Recycledgoods.com
Apple IMac Excellent Condition Super Fast 4gb Ram 500gb Storage for Sale in Lilburn, GA - OfferUp
A-Tech 4GB RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010, Mid 2011, Late 2011), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Module at Amazon.com