This is a Rockwell Collins VHF-251 COMM Transceiver P/N:622-2078-001 in nice condition.  It was working when removed about 6 months ago.  I kept it for a backup, but just sold the airplane so don’t need it any more. 

It is in good cosmetic condition. It comes with the mounting tray and connector.  There are no scratches on the face and the knobs are in good condition. See pictures for details.