Internal SSD DIY KIT for All Apple 27" iMac 2010 Models
Apple iMac 27 inch Desktop - MC784LL/A (2010) for sale online | eBay
Apple iMac 27" Mid 2010 Core i5 2.8GHz 16GB RAM 1TB HDD Radeon HD 5750 CHIPPED | eBay
Apple iMac 27" 2010 A1312 Intel i3 4 GB RAM 1 TB HDD Radeon HD 5670 macOS 10.13
Apple iMac 27" - Mid 2010 Reviews, Pros and Cons | TechSpot
Incase anyone ever needs the answer…I have a 27” 2010 iMac working in Target Display Mode with a M1 MacBook Pro using a miniDP to USB C adaptor that's capable of 4k60Hz.
APPLE IMAC 27 INCH A1312 INTEL CORE I7 2.9 GHZ 8 GB 1TB HD 2010 USED SIRREA USED | eBay