Deal #3 went through today. For 22 Topps cards from the '70s, the only notable name being a 1977 Bucky Dent, I got halfway to a Cubs Diamond Die Cut set, with an Aramis Ramirez.
Apparently, the easiest way to get these things is offer up a crapload of commons and see if anyone bites. That now puts me at Aramis Ramirez, Carlos Marmol, and Starlin Castro, with Ernie Banks, Tyler Colvin, and Marlon Byrd left to go. I'm hoping that I can swing some easy deals for the Byrd and Colvin, but the Banks is going to be a tough one.