Sometimes going through my collection or decks I rarely play or browsing Gatherer, I have a moment of, "Don't I have one of those? Where did it go?" It would be really handy to be able to search completed trades for cards that I sent out - ie. cards I used to have but don't anymore.

Possibly this could be included in the screen for each individual card? There’s a place where current trades are displayed. Maybe completed trades could be there too