Except you can't buy TCG mounts at any time. They are a limited good, the price will continue to rise as the supply goes down. Two years ago the rooster was $500. Now it's like 8.
Also, you clearly didn't look at anything because the price has already reverted to normal.
https://wowtokenprices.com/EU
It had one tiny dip of about 5k below what it was at that time yesterday and has already gone back up to normal prices.