The fun about stamps is that you can have a great time with just seemingly ordinary stamps.

The target cancellation or cancel or obliteration is worth something. It can be called a fancy cancel or bull's eye cancel also, depending on who you are talking to. The stamp itself seems to be in good general shape so that adds to the value.
The other stamps in the second picture I do not recognize but that may be me.
Cancels, whether precancels or regular postmarks and obliterators or obliterations (bars, ovals with numbers, circles, funny shapes made from cork carving, etc) can be a study just in them selves and worth something.
Sometimes the big money is the money in your interest and fascination and calmness and peace from collecting and hunting (that's the excitement) or sorting of stamps.
The more you do, the more you find out and the more you learn and apprecaite, justlike anything.