ShopTo are selling "Harvest Moon: Magical Melody" for the Nintendo Wii for £14.89 (inc Del.)
You can get cashback through the usual sites (e.g. 4% Quidco, making it just £14.29)
The next best price seems to be £17.99 from BlahDVD.
Harvest Moon: Magical Melody
Taking over your own farm, you raise plants and animals, catch lots of fish and then see your character grow into adulthood.
Cows, horses, sheep and many other animals.
Buy farmland next to a river, a seashore or in a village.
Plant crops, raise livestock, dig for gems or just fish.
Beat your farming rivals in the fields and at the festivals.
Unlock hidden multiplayer games.
Interaction with town folk and even falling in love are major points of the game.