In a report on Blueprints today, Psyonix uncovered that players will have the alternative of exchanging the things with different EFT Items players.

however there are a few special cases. Free drops, uncovered Blueprints, and things produced using Blueprints will all be tradable, as will any stock things that are tradable and were gained before the new framework's appearance.

Psyonix says concealed Blueprints can't be exchanged; sometimes, Credits will be tradable. Credits won't be tradable in the event that they're exchanged for credits and they won't be tradable 'to no EFT Items for Sale end.