I guess a lot depends on where you are and if you can get chicks or not. Some stores charge higher prices because you can't get them anywhere else locally and others just charge it just to make a profit.
Our feed store sells them for $3-4 but only offer chicks once a year and they have to be preordered for "chick days" in May. Another farm store near here sells them for $6-8 a chick.
And all of these are hatchery stock, so nothing that appealing about them IMO, other than possibly good layers. I guess the main benefit for most people is you don't have to buy 25, like you do from a hatchery, so the extra cost is worth it.
Jody