Price in USD is $3.84, but if you get PayPal to charge you in GBP it was calculated as £3.04 when I ordered few minutes ago.
Price includes free delivery. I know a lot of people here don't like gearbest (or as most call it gearworst). I suffered too with delayed shipping's but items always arrived so for this price I thought worth the punt.
Its 12volts so you need external 12v power supply which is not included as far as I know.