Bought new in October 2017 and installed in a PA28. Removed in October 2018. It was working fine when removed and is configured for a 52D54 Directional Gyro. In my plane it was hooked to a Sigma-Tek 4000C. STEC can reconfigure this for different heading inputs such as an HSI. $600 as-removed. I'll cover shipping within the lower 48. .