I paid Ł20,000 for my A3, 3.5 years ago. so far it has cost me Ł6300 in service and maintenance to give it a FSH ( not tyres/exhaust etc) so I have shelled out Ł26,300. I have covered 30k miles and the car has been valued at Ł8k now. So basically it has cost me Ł5k a year to run if i sold it today. Thats a Ł100 a week before you even start it up...
The latest health check says the discs are shot and the Rad is leaking now at a total of 45k miles.
And its been in the workshop for a month now so i can expect another bill to add to these totals'
The advice from my Audi main dealer was, buy new keep for 3 years or get an extended warranty and then sell ! Never keep it out of guarantee unless you have very deep pockets.
If your out of guarantee then you are living on luck IMHO...be warned.