I've got an Edo Aire 4000C Directional Gyro that was removed from my plane last year. It was overhauled in 4/09 by Rudy Aircraft Instruments in Rudy, AR, and flown about 350 hours before I removed it for an Aspen install. This DG is compatible with STEC Autopilots and has a heading bug that will output to the AP. I'll take any reasonable offer. Listing it here before I move it to eBay...