Two nights in a row I played Rumble games (PC) and started off by posting in the chat:
"Trading (3) Champ Crate 2 for (2) Keys"
I ran into a few things doing this.
1. 60% of the time other players would discredit my offer by telling me how stupid I am and how that is not a good deal at all and nobody would agree to the trade.
2. Tell me to go to the official Rocket League trade section to put up my trade (I had already done that but got no response and the players that post there ask way too much for things imo)
3. Someone would agree to trade, I would add them on Steam and get them in the RL trade window, they would realize their keys were locked and unable to trade but agreed they would do the trade if I still had the crates when their keys were unlocked (happened about 5 times)
4. Finally got someone to do the trade and complete the trade, he also asked to do the same deal with me in the future if I get more crates.
Used one of the keys and unlocked one of my Champ 1 Crates and got the exotic Looper wheels.
Got a lot of hate for trying to find someone to do this trade but was successful in the end and worth it