Shop4Tech offers the Charge & Sync USB Data Cable for Apple iPhone / iPod in White for $1.19. Coupon code "AE20" cuts it to 95 cents. With free shipping, that's the lowest total price we could find (outside of the price below) by $3. (For further comparison, we saw a 3-pack for $5 shipped 10 days ago, since expired). Coupon expires August 26.

Of note, expect this item to take 3-4 weeks to arrive.

A close price: Autoarmour Auctions via eBay sells it for 99 cents with free shipping.