Apple Store offers its Apple Lightning to USB Cable, model no. MD818ZM/A, for $19. Choose free in-store pickup to avoid the $4 shipping charge. That's a buck under our shipped mention from two weeks ago and $1 under best shipped price we could find, outside the price below. Sales tax is added where applicable. It features a proprietary chip that allows syncing and charging via your computer's USB port or to the Apple USB Power Adapter.

A close price: Verizon Wireless offers it for $19.97 with free shipping with sales tax added where applicable. This is available for immediate shipment (most merchants have a 2-to-3 week wait time).