Posted By: 
bruce dorskind
Whilst the focus of my collection has been on rare baseball cards,
advertising pieces, scorecards  and tickets from defunct leagues and player
endorsed sheet music, I have been very fortunate to acquire some of
the truly rare post cards in the hobby.
Among my favorites are:
Athlectic Baseball Team           1906     Andrew Coakley
Rotograph Series                       1908    Joseph McGinnity
Atlanta Crackers                         1909    Dick Bayless- Charlotte
Cleveland Indians                      1910    Carisch
Monarch Typewriter                   1911    Eddie Collins (this one is super rare)
If anyone wants to learn more, see copies or learn about value,
let me know.
I have always thought that these rare post cards (all of which are in
at least excellent to mint condition) have been long indervalued.
Look forward to hearing from you
Bruce