OK, The Flint edge is a nice stamp and the axe is in very good condition, the USFS stamp on the other side makes it better. Very nice.
The Homstead is nothing much unless its a 2 1/2 pound cruiser. The eye size will be smaller than on that flint edge. I suspect that it is a cruiser but can't tell for sure from the picture. Cruisers are always sought after. Homestead is a Collins axe brand.It's alsoin very good condition.
Stanly didn't make much in the way of full size axes that I know of. Yours looks like a Boys axe, or house axe. About 2 1/4 pounds if it is a boys axe. It is not in as good a condition as the first two, but not bad. The logo is called a Stanley Four Square. The stamp on the other side is called a Stanley Sweet Heart. The Sweet heart makes it much better than just a four square.
Your doing pretty good so far!
I don't know what you paid for that box of rusted heads but I am thinking you did alright.