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 :
Installing additional SSD in Mid-2010 27" iMac
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube
Amazon.com: OWC Paquete de actualización de SSD de 1 TB para iMac 2011, OWC Mercury Electra 1.0TB 6G SSD, AdaptaDrive 2.5" a 3.5" soporte convertidor de impulsión, cable digital en línea, herramientas