Amazon Local offers a coupon for 30% off a selection of computer accessories at Amazon for free. (Note that a credit card is required to complete the transaction, but you won't be charged. The coupon will be added to the "My Vouchers" page of your Amazon Local account.) That's the first such offer we've seen from Amazon Local on tech accessories, yielding savings on a range of items. Limit one per customer. Deal ends November 21, and coupon expires December 18.