I know if you buy from the online store, if you decide to return your item, you can ship it back to Apple for free. What if you buy from a retail store? I ask because I'm vacationing near an Apple store and might buy a mini, but if I decide its not for me and want to return it, I won't be able to return it at the store. Will Apple let me ship it back to them? Can I still do that for free?