I keep a stag pen with a few choice roosters in it that I keep for breeding. But the extras are always welcome at freezer camp. Wyandotte are quite tasty.

They are always calm (not fearing for their life and freaking out), and we do it very quickly. They pass out before ever feeling pain. There is no shame in letting a bird feed someones' family. We feel like ours have had a really good life with only a couple quick bad moments. I don't mean to be rude or uncaring here. My intent is to support you.

I have even seen people put "pet only, if you intend to eat him I don't wanna know". But I also see people genuinely looking for a rooster for their flocks. In fact I got contacted about an add I placed looking for someone to process meat for me and one of my roosters that was slated for the freezer found himself a new home with 10 ladies of his own! They hatched chicks and he is still living. Plus I made a chicken friend that I get to talk all kinds of interesting stuff with. But yes, discernment is key. It often takes me two weeks to get really good response.
I agree about not trusting CL, there are plenty of creeps on there. Surprisingly though, I have also met some really good chicken folk and even gotten good quality birds (farm and garden section). I also got taken once in the beginning on someone selling barnyard mix claiming another breed. But that was one of the best lessons in my chicken keeping life, and now I know what kind of questions to ask and what kind of answers I'm looking for.
Anyways.. one possible alternative (though I'm not personally a rule breaker), is a no crow collar. Have you heard of them before? It's essentially a wide strap that goes around the neck and stops the air sack they use for crowing from filling up enough to make loud sound. So it's more like.. well I don't know, but you might be able to find videos. I've heard of people using them incorrectly and causing injury. But also of people who use them successfully.
Your pics holding him don't do his beauty justice. So consider getting a side standing shot if you place a pic when you try to find his new home.