Why don't you want to trade with players on Epic?

It goes both ways, that was only an example. I could only want to trade with Epic and still have to go through Steam trades.

That's right, but why don't you want to trade with either? As long as you're on PC it doesn't matter if the other party is on Steam or Epic.

I mean, the whole point of separating the filters is to give us options. The more, the better. If someone wants to trade with both platforms, fine, just select both on the filters. But talking about Epic, usually they take hours to answer and their prices are not always the same as Steam, that's why I usually tend to prefer Steam trades.