Unfortunately there are very many folks keeping chickens. Too, most are NOT breeders and those that are keep closed flocks. You're not likely to get anyone to pay for them. I just give my extra roos away. Too some folks won't take them unless they're table ready.
I have one friend who culls right away. If you can find someone to do them for you then that might be the route to go.
I have seen a posting on craigs for "unwanted " animals but I'm not optimistic that they're a decent place to go.
So it's likely your only options are
1. grow them out and eat them yourself.
B. Find someone to cull them as is.
III. Find someone to take them for free.
D. Take them to an auction but don't expect to get much. ( I find it's not worth the gas it takes to get them there.)
FYI everyone. A friend of DW's gave her a copy of an SPCA mag that has an article on chickens. I've not read it yet but will get back and give you a blurb about what it says. I carry a bag of magazines to read while waiting at DW's appointments.
I haven't courage enough to take my crochet yet.