I have experience as a purchase or refund (waiver of parcel
) kindlove from Amazon. In a nutshell, it's simple and reliable as an axe for 160$(Wi-Fi) kindle brings the courier about a week later after purchase. As shown much profit the presence of 3G brings, therefore, the benefit of it, is subjective, doubtful. Although each has its own use cases, and it might come in handy.
You can order no more than one kindle, the next desirable only after the delivery of the previous, otherwise you risk dealing with the greedy persons at the customs. If faced with customs you will have to refuse the package and wait for refund, Amazon the money back in full, including delivery charge, but it takes about three weeks.