First I want to preface that I only have my hockey collection primarily in the site and only have a dozen or so baseball players' worth of cards input already. So for baseball it says I have 3,728 in collection but this is not really in reflection of what I actually own. I collect all baseball and my estimate of how many baseball cards I actually have (which includes doubles because I am doing a box estimate here) is around 276,000.
That being said, here are the numbers requested
Collection: 1,129 (1990)
Wantlist: 2,695 (2005)
Traders: 123 (2013-14)
How it breaks down is like so, which may not be obvious. 1k cards from 1990 in collection is primarily taken up by 1990 Pro Set football, and the cards for the WInnipeg Jets, which includes all those pesky variations.
2005 being the leader on wantlist is 2,539 baseball is... actually I can't figure this one out. The 2nd place for wantlist is 2008 with 2,507 which can be partially explained by Topps Moments & Milestones which shows up as the top 4 in sets. But 2005 doesn't show up on page 1. It looks like there are just a lot of single cards from sets in that year, 1300 is just Manny Ramirez. IDK.
Traders are down to the fact that those are all hockey cards and I still have even more from that I didn't put into the site.
TCDB Collection Leaderboard spots:
#1 Alexei Zhamnov #1 Shane Doan #1 Phoenix Coyotes #1 Arizona Coyotes