Above you'll find some of the sets I've built so far - 1965 O-Pee-Chee, 2014 Topps Heritage, 2014 Topps Heritage Minor Leagues, A Twins Frankenset, and a few partial sets I'm working on now. Second from the left is 1964 Topps Venezuelan.
The answer to this Blog Bat Around is pretty easy for me - I've been chasing the 1964 Topps Venezuelan set for a couple years now, and it is extremely rare to find even one card in the wild. I have been slowly picking away at the set, and I finally put them into pages. Still no completed pages, though the page above is the closest.