Walmart and iPhones

My dad and I have spent the morning calling every Wal-Mart in the Inland Empire (we called as far west as Pomona, as far east as Beaumont, as far north as Highland/San Bernardino, and as far south as Temecula) and most in Orange County. Persistence did not pay off. There are no $97 16GB iPhones left. We were thinking of getting my mom one for her birthday.