Amazon.com: Computer 2nd HDD SSD Hard Drive Caddy for Apple iMac Mid-2010 27-Inch Core i7 2.93 MC784LL/A MC784 A1412 All-in-One Desktop, Second Solid State Drive Enclosure, CD DVD SuperDrive Optical Bay :
iMac 21.5" Late 2012 i7 vs. 27" Mid 2010 i7 - Which one should you buy? - YouTube
Apple iMac 27″ Mid 2010 Core i7 2.9GHz 8GB 2TB DVDCDRW WiFi macOS 10.13 High Sierra – Refresh Computers Online Marketplace
iMac 21,5 2009-2011 LGA 1156 with i7, works good!! | MacRumors Forums