I don’t sell chicks but occasionally some people want hatching eggs. You need to find a market. There are different ways to go.
Chicks from hatchery stock that are purebred should sell for more than mixed chicks from hatchery stock. These are nowhere near the quality of show chickens so you won’t be able to get the high process they can get, but it’s better than just mixed.
As CT said, if you can hatch sex linked chicks you can guarantee that they are pullets, but you them have the cockerels left over. What do you do with them? Practically no one wants cockerels.
If you can get chicks that are sure to lay blue or green eggs you just might have a hot product. You can get pure Ameraucanas or Ameraucanas and have colored eggs, or you can put a rooster from one of these breeds over all your hens, as long as he is a pure breed, and get pullets guaranteed to lay colored eggs. As long as those are the only roosters you have you don’t have to separate any of them.
If you can develop a specialty product you can get extra or maybe just sell hatching eggs instead of chicks. And even if you can’t get a lot more money per chick, you can find more customers. It’s better to sell them for something as opposed to not be able to sell them.
Good luck!