I do already have the whole non-SP base and 1983 retro sets (twice each!) from buying so many packs. What I need are the Diamond Kings, Rated Rookies, and all the other stuff like Dominators, Masters of the Game, etc. So, if you're like me from last year -- when I didn't bother with the rarer shiny stuff, and traded them away for other things -- we'll make a great match!
I have a ton of 2017 Topps base, Heritage, Donruss and Panini Diamond Kings to trade, as well as tons of 2016 inserts of all kinds. I just can't put them all in the database because there are so many!