Standard model should cost around 9k from a dealer and 7.5k - 8k private. Anni models to cost more due to the extras, which to be fair are only cosmetic. There are plenty of specialist places around to get them repaired and serviced just dont use the main dealer or you will be ripped off. Also that year will be close to if not coming to the end of the factory warranty so check that and if it has had any work done under warranty.
Parts can be expensive due to the fact that its still fairly new but places like GSF and Euro car parts have bits in at good prices. There is always e-bay for bits.
Tyres will be expensive because they are 18's and there is no point putting crap tyres on a good car like that.
Good luck with finding one and use the internet to get as much info as poss as you will be spending a lot of cash on a car and it pays to get the right one in the first place.