Amazon.co.uk offers the LEGO Mindstorms EV3 Set, model no. 31313, for $345.10 (£208). At final checkout it falls to $287.58 (£173.33). With $8.21 (£4.95) for shipping, that's the lowest total price we could find by $54. It has a remote, USB, and app that allows you to build a robot with three sensors.