The top stamp is Michel 227 with an unusual cancel. It may have been on a parcel. Minimal value.
The other two appear to be likely forgeries of post-WWII locals from Bundesland Sachsen. Immediately after the war no stamps were available so local authorities had some Hitler Head stamps overprinted with various designs including blobs as on the left stamp and a castle as on the right stamp. The stamps are not expertizable if they are not used and on cover. In any case they are considered provisional issues. Another difficult area of German philately.