Even if they weren't silkies, there are folks who would like full grown chickens. Much of my flock is two years old, another good third of it is a year old. Chickens live longer than a lot of people believe them to do so.
Oh, cool. I am sure people will want to but them. Maybe if you look online for websites that buy, sell, and trades chickens. I would buy them myself but it is illegal to have chickens where i live.