SwitchBot $1 + $10 shipping (new customers/account)
normally $30 + shipping
signup with e-mail on the pop-up window in the middle when you first go to the website. Then click copy to copy the coupon and order.
ships from city of industry, CA
this is an international site so it would be to your best interest to pay with paypal and not directly with your CC for double protection should something go rogue and you have to sic paypal on them.