If you want to buy an iPhone for you sweetie for Christmas, better bring your credit or debit card because they will not accept cash:

Apple Inc. no longer accepts cash for iPhone purchases and now limits sales of the cell phone to two per person in a move to stop people from reselling them.
The new policy started Thursday, said Apple spokeswoman Natalie Kerris. Before then, there was no cash restriction and the purchase limit was five per person.
[…]
Apple thinks some people already have purchased multiple iPhones to resell, including those looking to modify, or “unlock,” the phones so they work on networks other than Apple’s carrier partner in the United States, AT&T Inc.