Initially, just to make things understood, you can't get a full discount on any thing you purchased with Rocket League Trading in Rocket League. You got it, you own it.

You can, in any case, get a Credits discount of the contrast between the value you paid and what the thing costs now. Suppose you purchased another vehicle for 1,200 Credits before the December 11 update and it presently costs 800 Credits.

You will get that 400 https://www.lolga.com Credits distinction back, included into your Rocket League account.