Cellular Factory offers this Micro USB / Mini USB / PC Adapter for iPhone 3GS for $1.99. Bag free shipping via coupon code "1LXBOK". That's $5 off and tied with our mention last month for the lowest total price we could find for such an item. It allows you to use a mini USB or micro USB female cable as a charging and data cable for your iPhone 3GS. Coupon expires September 10.