How many are you looking for?
If you want a good variety, and don't mind a bunch, try out Cackle's Cackle Surprise. It's $60.95. You get a huge assortment. They guarentee you'll get 40 live birds, but most people get more than that. I've gotten two of them already (and my third next week). I got 54 chickens, 2 ducks and a turkey the first batch, and 48 chicks and 2 ducks in the second. If you only want chicks you can leave a note in the comments when you checkout that you only want chicks, no ducks or anything.
The variety you get is amazing! I got several silkies, several polish, a pair of houdans, many cochins, a pair of Egyptian Faoumi's, several Old English Game Birds, some Easter Eggers, some Barred Rocks, and a few phoenixes. Plenty more, too. I've sold a lot of them!
If you don't want that many, you can try Ideal's surprise assortments. Right now they are $1.25 for straight run and $1.75 for pullets, minimum 25 birds. They also have a bantam assortment.