This list is quite long and I recognize that one set has more than just one cards, but I feel that it deserved to be in this list: some are white whales and some should be easier to find.
HOCKEY
- 1960-61 Parkhurst #45 - Maurice Richard (any condition)
- 1972-73 Topps #100 - Bobby Orr
- 1991 Arena Draft Picks French #4 - Peter Forsberg
- 1998-99 Be A Player (Toronto Fall Expo) #215 - Steve Duchesne
- 1998-99 Pacific (Montreal International) #366 - Steve Duchesne
- 2003-04 ITG Toronto Star #98 - Jaromir Jagr
- 2004-05 ITG Franchises Update #489 - Michel Briere
- 2013-14 Panini Player of the Day RC2 - Nathan MacKinnon
BASEBALL
- 1991 Swell Baseball Greats #146 - Brooks Robinson
- 1994 Rembrandt Ultra-Pro Mike Piazza #NNO - Oversized (Tall boy) Thanks to AvsBruins65
SET BUILDER: Baseball ◉ Hockey ◉ Misc. Sports ◉ Non-Sport & Oddballs
PC: Felipe Alou ◉ Derek Aucoin ◉ Steve Begin ◉ Jennifer Botterill ◉
Kevin Dineen ◉ Laurent D.-T. ◉ Bob Kudelski ◉ Manon Rheaume ◉ P.J. Stock