Cuban cards, negro league, puerto rican...etc
 

where is the best resource to learn about these cards (pre1960s) , values, demands, sets...etc

thx!

Try www.cubanball.com

Terrific site. Equally useful is Ryan Christoff's site: http://www.cubanbaseballcards.com/index.html He holds nifty auctions periodically, too.
Pick up a copy of Smoke from the secondary book market (Amazon, Alibris etc). Not much in the way of prices, pop reports etc but a trove of great photos having to do with Cuban baseball in general with a good emphasis on cards.
http://photos.imageevent.com/kawika_...ze/DMcD010.jpg http://photos.imageevent.com/kawika_...ze/DMcD011.jpg

A few typecards and such from my very humble Cuban collection.
Have fun.
http://photos.imageevent.com/kawika_...tas%20Atan.jpg http://photos.imageevent.com/kawika_...%20Cueto_1.jpg

http://photos.imageevent.com/kawika_...Dandridge1.jpg http://photos.imageevent.com/kawika_...Dandridge2.jpg

http://photos.imageevent.com/kawika_.../Matanzas1.jpg

thanks!