ihocon: Oral-B Precision Black 7000 充電式電動牙刷 Rechargeable Electric ToothbrushAmazon 現在 Oral-B Precision Black 7000 充電式電動牙刷 Rechargeable Electric Toothbrush 原價 $219, 特價 $126.6, 在價格的下方有個 $30 Off coupon (需先 sign in Amazon account), 按 “Click Coupon”, 可再省 $30, 最後變成 $96.6, 免運費!!