Imho there has to be a lot wrong with an axe head to make it unusable. I get that it might be easier to just go out and buy a new one, but it might be a lot more satisfying to clean up your current one, find a good quality haft to replace the old one. Watch some YouTube videos on the sharpening and hafting process, you will learn a lot.
I've got 4 axes, a splitting maul, splitting wedge, and two mails that I bought for really cheap and have put them back into use. I love using them because I took old high quality vintage stuff that was one it's way to the scrap pile, and gave it new life!