Seller1On1 via Amazon offers this Chromo Inc. Apple MFi-Certified 4-Foot Lightning to USB Cable in White, model no. CI55000354, for $6.99. Coupon code "E4H9UFPH" cuts the price to 99 cents. With free shipping, that's the lowest total price we could find by $11 and the best we've seen for a MFi-certified lightning cable. It's compatible with most lightning-enabled devices.