HD Upgrade Kit for all iMac late 2009 - mid 2010 Models - 33.73EUR - OWCshop
SSD Kit for all Apple 27” iMac 2010 Models + tools - 17.65EUR - OWCshop
OWC SSD Upgrade Kits for 27-Inch iMac 2010
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
iMac Repair & Upgrade, Same Day Services
iMac Core i7 Review (Mid 2010) - SlashGear
How to add a fast new SSD to your old Mac or MacBook for only $150 - 9to5Mac
Installing additional SSD in Mid-2010 27" iMac
2010 iMac SSD Upgrade - Finally!! - YouTube
My 12 y/o son is so excited. Found him a pristine Mid-2010 27" iMac for $100. Going to give it the SSD upgrade but he's stoked to start recording music with it :
How I kept my iMac running for a decade | Cult of Mac