Their paint silkies are 99 bucks I think and I'm sure their others are at that same price. Mareks vaccine is another 60 or so too if I remember correctlyI'm sorry for your loss.
They couldn't have waited to ship, chicks have an yolk sack internally for a few days after hatching so thry dont have to eat or drink. After it's used up, it's not great to ship them. They likely would've been better off if they weren't stuck in a blizzard but this breeder has always been a bit sketchy. What exactly cost $300?