The latest limited time deal cranking out of Jack in the Box is 2 for $3 Breakfast Croissants. Unlike most supermarket deals, but like most fast food chains, you do have to buy two croissant sandwiches to take advantage of the offer.
You can choose from two croissant sandwiches: the Sausage Croissant which comes with sausage, fried egg, and a slice of American cheese or the Supreme Croissant with fried egg, Jack's new hickory smoked bacon, ham, and cheese.
Not a bad deal at all. I'm pretty sure croissants cost more than biscuits or English muffins.