North American retail chain Best Buy has begun discounting 3G iPads on their US site, taking $30 off the $130 premium those units normally cost over the Wi-Fi only models. All three capacities (16, 32 and 64GB) are affected by the sale, which has no set end-date, reports 9to5Mac. Due to Apple's advertising guidelines, the iPads are listed at their normal price on the item-description page, but with the extra moniker of "on sale." Adding an iPad to the cart changes the price to reflect the discount.