Cinnamon Roll
Songster
Just take him from wherever he sleeps.
The broomstick method is a way to humanly kill a chicken. It involves putting a laying the rooster on the ground, and placing a bar across its neck. You then step down on the bar with both feet, and pull up on the legs at the same time, which breaks its neck.
Done right it is very fast, and one of the kindest ways to cull.
However, I can't see anything wrong with what you are trying to do, and re-home with full discloser.
If you get some who wants him, just make extra sure that they know just how bad he is, and that they don't have any kids that could be put into danger.
He could make a lovely soup for someone.
If no one wants him, then either you, or a family member, will need to do the deed, as he really needs to be gone.
The problem with rehoming an aggressive rooster is that you could be advertising to cock fighters. It still happens and that would not be a good result for this rooster. Hopefully an ad on this website wouldn’t end with that result but @Santamanhank might have to advertise in a few places to get rid of the bird.
He’s already had a longer life than many many better behaved roosters so I personally wouldn’t have any qualms saying goodbye to this roo. It would be a lot easier on him to have a quick end than get taken to a new home and have the same problems. His hormones will be the same there and that is mostly what is causing him to act like that. If he were butchered I’d bet he would have VERY large testicles, and unfortunately male animals with a lot of hormones are hard to reason with…
For those who haven’t done it before, with the broomstick method it is best to have a shallow divot in the ground for the neck to go into before you put the stick across the neck. You don’t want the chicken to get panicked if it can’t breath. (And it reduces accidental beheadings.) I am not always fast at positioning my feet in the dark so a confused chicken is way better than a panicking one at that point. The divot holds the neck in position and the bar holds the head in position, then you pull the chicken’s legs so the neck and body are dislocated from the head. On a mature rooster it can take a lot of force but the main thing is to pull his body forward over his head past the point that it can bend naturally so that it has to break. Practice on a doll or a towel so you can get the logistics worked out and have an axe handy in case things don’t go perfectly. Do not hesitate once you’ve begun. You can cry later, and I still do sometimes.
Anyway, the best video I’ve found to show the method is this one.
Broomstick method