My AD08's have done 13 track days now, granted two have been interrupted by rain though. Still, impressed. The times don't seem
to be dropping off yet either. I'm just waiting for them to die!
Briz, the AO50's are such a low volume tyre here in Aus. So I can fully understand the price. You have seen it over in Europe, the shear number of cars that turn up to track days and number of events outweighs many times over what we have here. Sames goes for the states.
The more demand there is, the more supply and competition on price.