Hey this is a really good idea for a thread as I've often wondered what sort of costs I would be looking at if I upgraded my GTST to a GTR. I've seen that most people here (so far) spend about $400 on maintenance, would this be say the average cost of a service or was this the fee just to get the car 'up to scratch' after the purchase. Sorry but I don't know much about GTR servicing yet, only that they have to be serviced a lot more regularly than GTST's.