I wanted to trade with a few things from friends on the Rocket League account on the PS4. A friend of mine said that you have to buy 500 credits first to be able to trade, is that correct?
So on PC it is at least the case that accounts that AFTER the free access have to buy at least 1000 credits (I think) to prevent scam.
If you have had it before, you will be able to trade without any problems.
Yes, you need 500 credits to be able to trade.
To reduce fraud, players involved in a trade must have purchased at least 500 credits. This includes the 500 credits from each starter pack. Players who played Rocket League prior to the free-to-play update are exempt from this requirement.
https://support.rocketleague.com/hc/en-us/articles/360015559674-How-do-I-trade-with-other-players
