AliExpress, though the listings might be lying. $50 is a more reasonable ceiling: http://www.aliexpress.com/category/5090301/mobile-phones.html?shipCountry=us&

AliExpress, though the listings might be lying. $50 is a more reasonable ceiling: http://www.aliexpress.com/category/5090301/mobile-phones.html?shipCountry=us&shipCompanies=&SearchText=&minPrice=&maxPrice=50&minQuantity=&maxQuantity=&isFreeShip=n&isFavorite=n&isRtl=n&isOnSale=n&isAtmOnline=n&similar_style=n&similar_style_id=&CatId=5090301&pvId=190-361828&isrefine=y http://www.aliexpress.com/category/5090301/mobile-phones.htm... That said, from everything I've heard they're almost unusable.