How can I get rid of a rooster?

I bought 4 chicks from a feed store in mid April and they were 90% guaranteed to be female. For the last two weeks one of them is crowing, so I'm pretty sure it's a rooster. We are not zoned for a rooster and I live in the city, so the homes are all close together. I don't want to get in trouble for having one and mostly I just want chickens for eggs. I'm wondering how to get rid of it. I have never slaughtered a chicken and really have no interest in doing so. I tried contacting the feed store where I got it and they said they would take it back for a fee. I'd rather not pay to get rid of it. Are there any other suggestions? Oh, and it is a Buff Orpington and very nicely tempered (at least so far). I also tried calling 2 zoos and Knott's Berry Farm and none of them would take it.