Forum Classified Ads      (2) ED-520 for sale Posted by: Cory Wallace , E-mail: Address, on September 11, 2008 at 20:43 : I have two ED-520's for sale. SN# 821926 This one is complete, with batteries, power cord and buzzer (part # 211940A Model# TH1021). Serial # Calibration just expired, but can be easily calibrated again. This unit was used and maintained regularly in our FAA approved repair facility. Good condition. Full case and manual included. SN# 78380 This unit was our stand-by unit. It will need a battery and power cord, and calibration. Excellent condition. These tools are located in southern Florida, shipping worldwide available. Email me for more pictures and info. Forum Classified Ads Help