Here's how the Rocket League Item Shop works has not posted anything yet
Rocket League, which is known for its multiplayer soccer interactivity however utilizes an assortment of smaller than normal vehicles, was declared to leave the Steam administration https://www.rocketleaguefans.com/trading-prices. This is identified with the status of the game which changes to free.
Cited from PC World, the game which is as of now well known and even has its own esports competition sooner rather than later will change to the Epic Games Store https://www.rocketleaguefans.com. They have not clarified the effect of this movement on gamers who play by means of Steam accounts.