These new iPads and lower prices on last year's models have created some pretty decent deals on refurb iPads sold by Apple. Refurbs from Apple are usually indistinguishable from new, have a full 1 year warranty from Apple, and a brand new battery and shell.
iPad mini 2s starting at $249 for 16GB, $299 for 32GB, $349 for 64GB, $439 for 128GB (+$100 for LTE)
http://store.apple.com/us/browse/home/specialdeals/ipad/ipad_mini_retina
iPad Airs starting at $339 for 16GB, $389 for 32GB, $439 for 64GB, $529 for 128GB (+$100 for LTE)
http://store.apple.com/us/browse/home/specialdeals/ipad/ipad_air