I have done the same when I have set eggs and expect to have extra chicks. You post a nice ad on craigslist with some photos of your flock, state when they’re due to hatch and then have people give their contact info if they are interested to be contacted when the chicks hatch.
Just be wary whenever using craigslist as there are a lot of crazies out there.

Just be wary whenever using craigslist as there are a lot of crazies out there.