You can quickly select your Fitbit Flex 2 FB403 using our search bar or step by step method so that you receive an accurate Instant Quote. Remember, our goal is to make selling your Fitbit Flex 2 FB403 the quickest, easiest way to sell and trade-in online. We provide free shipping on all orders, pay quickly and your Instant Quote Value is good for 30 days. BuyBackWorld.com buys your used, old, broken and unwanted Fitbit Flex 2 FB403. To sell your Fitbit Flex 2 FB403 for cash, simply tell us a little more about your device above and then checkout to get paid.