Hi there Nikolas,
I can see that this issue (Drake Racer’s Scarf not being available to purchase) has been reported by other players as well and is currently under investigation.
For any other issues, please do report them if you haven’t already – more info here:
https://eu.battle.net/support/en/article/000339262
Obviously we will do our best to verify and address each reported issue, but sometimes things have to be prioritized according to the severity and amount of players impacted.
Thanks for taking the time to let us know in any case!