This price has come up in the past at walmart (expired) and currently also on Mobvoi's own website, though the amazon deal could be even better, see below.
Price shows up as $299.99, be sure to clip the coupon for $45 off, which should bring your before tax price to $254.99 + FS.
Nice thing about being on amazon is some folks will be able to use amazon gift cards or their existing balance, their amazon Prime for expedited shipping, and potentially get another 3-5% cash back depending on which amazon credit card you may have.
I personally really like this watch due it's extended battery life and being able to save my credit cards on the phone, with google pay, and later using the NFC to pay for purchases. This comes in handy if you don't want to carry your wallet or phone with you, e.g. going on a run etc.