AT 5 months, those cockerels are full of hormones and coming into sexual maturity. Your pullets are't there yet, so the first thing you need do is separate those boys. Build them an extra pen if you need to. Then you need to figure out if you want to have a bachelor flock that really isn't good for anything except eye candy, or if you want to cull them. (To "cull" simply means to remove from the flock. It doesn not necessarily mean to kill.) If you decide to get rid of them, you can advertise at your local feed store, on social media, however you want to. But don't expect to get much (or anything) for them. Extra cockerels are easy enough to come by. I would also advise you to not ask any questios if it would bother you to know if they are headed for someone's freezer.
If they were mine, I'd put them in my own freezer. I'd rather process my own birds and know how they were raised and that they had a good life up until one bad moment.
If they were mine, I'd put them in my own freezer. I'd rather process my own birds and know how they were raised and that they had a good life up until one bad moment.