Chibi Robo! Zip Lash + Amiibo for the Nintendo 3DS.
£14.95 including free delivery and 140 reward points worth approx 0.35p!
At time of posting:
Nintendo store: £35.99 new.
Amazon: £17.95 new.
Game.co.uk: £29.99 new.
Tesco Direct: £19.73 new.
Argos: £29.99 new.
The Game Collection is selling the game only version for £12.95 so you are effectively getting the Amiibo for £2.
The Amiibo normally costs around £10-£15 on its own!