They look pretty good. The chick should grow out of the light beak.
The best quality Ayam Cemanis have black tongues, mouths, and throats as well as totally black feathers and skin.
Short chick down is normal for Ayam Cemanis. Fibro breeds naturally carry a gene that shortens chick fluff. A fluffy AC chick would be the poor quality one.
I sell EE and OE chicks for $4 each. Eggs are $1.50 per egg. What you can sell them for really depends on your local market.
To get sort of an idea what those chicks could go for, I made a list of prices that the major hatcheries sell those breeds for, then averaged the prices. The average...