Apple iMac 27 inch Desktop - MC784LL/A (2010) for sale online | eBay
Amazon.com: Original 1GB Graphics Card for Apple iMac 2010 27" Core i7 2.93 Desktop Computer MC784LL/A MC784 A1312, ATI Radeon HD 5750 GDDR5 1 GB Video Cards GPU Upgrade Replacement Parts : Electronics
iMac 27" 3.2GHz (Mid 2010) | mac of all trades
8GB 2X 4GB Memory Compatible for Apple iMac Core i3 i5 i7 Mid 2010 DDR3 PC3-10600 204 pin 1333MHz SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
Identify your iMac model - Apple Support
iMac Intel 27" (Core i5 or i7) EMC 2390 (Mid 2010) Memory Maxxer RAM Upgrade Kit - iFixit Store
Upgrade iMac Intel Core i3 CPU to Core i7 - iFixit Repair Guide