Groupon cuts up to 71% off a selection of new and refurbished iPhones, tablets, electronics, accessories, and more during its Tech Sale. (The banner mentions up to 45% off but we've found deeper discounts within.) Shipping starts at $3.99 or get free shipping on orders of $24.99 or more. Some best bets: Note: Refer to product pages of refurbished items for warranty information.