Elvis Aaron Presley-The King » On the official Steam declaration page

On the official Steam declaration page, Psyonix gives a helpful guide regarding what's tradeable and what isn't. Here's Rocket League Items that manage in full:

The designers behind Rocket League are getting ready to free the round of its plunder boxes, a framework for randomized in-game buys pundits express adds up to betting. While most clients hail the choice as an invite advancement, the change takes steps to overturn one of the game's most intensely contributed networks — its dark market.Currently, players can buy plunder boxes (known as containers in the game) to procure custom wheels, decals or vehicles to use in the game. There's no assurance what you'll get when you open another crate, each containing one thing from a bunch of likely contributions with different degrees of extraordinariness.

All that is evolving. Psyonix, the game's designer, and parent organization Epic Games declared recently that plunder containers will be supplanted with in-game buys where clients will know the "specific things you're purchasing ahead of time," eliminating the current component of karma. In any case, that haphazardness was a factor that profited a gathering of players who amassed in-game things and afterward either exchanged or offered them to players who liked to pay a premium than spend their cash on the unsure possibility of handling their ideal thing in a plunder crate.There's a whole network worked around exchanging plunder "Rocket League" through commercial centers, for example, the Rocket League Exchange on Reddit, for individuals to straightforwardly purchase or deal things from different players. Authorities and devotees purchase or sell explicit in-game things, and the valuing regularly depends on the uncommonness of the thing set by in-game plunder boxes. The more uncommon the thing, the higher the cost. A bunch of well known wheels may cost around $20 dollars on an open market — that is how much the whole game expenses. An extraordinarily uncommon thing Buy Rocket League Items can cost many dollars, if there's the interest. Sell a vehicle with the correct blend of uncommon things and it could go for thousands.