Info 2 [Q] Shopping unlocked smartphones from (Canada)

I am going to buy an unlocked phone, perhaps something like S G Note II, haven't decided yet. problem is I don't know where to buy, so far my best choice is

I've never bought anything this expensive from Amazon, I'm buying this as a gift for a friend and I like to give it to her in holidays. I am not sure what is Amazon Canada's return policy for unlocked cellphones, is it 30 days? or less? can I even return an unlocked phone since they have no warranty?

I like to hear your experiences about shopping from, do you trust for such products?