I got a FREE 2013 iMac 21.5 with internal upgrades including Samsung evo ssd and 16gigs of ram. Then used open legacy patcher to install Mac OS Venture 13.5 beta. : r/osx
Apple iMac 27 inch (Late 2013) Core-i5 + 500GB SSD | That's IT!
macOS Sonoma on a Late 2013, 27 inch iMac. Great succes! : r/OpenCoreLegacyPatcher
iMac 21.5 inch Late 2013 i5/8GB/1TB Fusion Drive - Used Products Utrecht