I agree with you. Aussie slang for a "fair bit" means that it's a lot. I guess in this player's case he was exceptional. We won't know unless he goes back on the TL or we ask the owner. I don't see many that age going for that much, though.
But you're right. The prices are super high. And they are super high for everyone, so everyone has that challenge, which makes it fair.
Except for what old mate said about the differing sizes in nations. That makes it unfair for sure.