I sell Silkie cockerels live, and currently get $15 for a 4-5 month old. Remember, I hold them until I am sure of gender ... the hens are MINE. The same customer also bought GLW slips at 7 months old for $15, then a couple more at 9-10 months old for $17 each. Again, these were live - I dropped them off in a carrier, then came back the next day (or so) to pick up the carrier. I did have a Silkie cockerel who injured himself while still young and small, so I sold him for $7 since he was maybe half-sized.
My customer has mentioned finding Silkies in a market somewhere in the region (I didn't ask where) that were smaller than what I've sold, and for I think he said $11 each, already processed so no telling just how fresh.
I keep telling my customer he MUST tell me about anything wrong/substandard/weak, needing improvement on the Silkie carcasses. So far, all he'll say is, "We'd love for them to be even bigger!" so I guess nothing is too wrong with what I am starting out with.