iMac A1311 21.5" 2011, in perfect working condition, non-negotiable

IMAC 21.5 INCHES MODEL/A1311 YEAR 2011 INTEL CORE i5 2.5 GIGAHERTZ MEMORY 20 GB 1333 MHZ DDR3 AMD RADEON HD 6750M 512 MB ATTENTION... NO MOUSE, NO KEYBOARD. PERFECT WORKING CONDITION USED EXCLUSIVELY AT OUR CLINIC FOR 14 YEARS, NEVER REQUIRED TECHNICAL SUPPORT