Please help identify these vintage baseball postcards

[varcity26]

http://i36.photobucket.com/albums/e17/Vm_Sportscards/95440C93-5EFD-4C8C-881A-29751D1CDD73_zpsnxlfcq9p.jpeg (http://s36.photobucket.com/user/Vm_Sportscards/media/95440C93-5EFD-4C8C-881A-29751D1CDD73_zpsnxlfcq9p.jpeg.html)

http://i36.photobucket.com/albums/e17/Vm_Sportscards/2A104CF6-338C-4A6E-8752-18568E202FAE_zpswdknl0im.jpeg (http://s36.photobucket.com/user/Vm_Sportscards/media/2A104CF6-338C-4A6E-8752-18568E202FAE_zpswdknl0im.jpeg.html)

1) http://s36.photobucket.com/user/Vm_Sportscards/media/95440C93-5EFD-4C8C-881A-29751D1CDD73_zpsnxlfcq9p.jpeg.html

2) http://s36.photobucket.com/user/Vm_Sportscards/media/59D466DB-489B-40C3-9444-974EC32A4076_zpseh094g3u.jpeg.html

3) http://s36.photobucket.com/user/Vm_Sportscards/media/2A104CF6-338C-4A6E-8752-18568E202FAE_zpswdknl0im.jpeg.html

4) http://s36.photobucket.com/user/Vm_Sportscards/media/E48BAE14-7EB5-49A5-A627-B0CB6A998F88_zpsbqivface.jpeg.html

[varcity26]

...........

[Leon]

The top left and bottom right postcards look like Major Leaguer's. The rest look to be amateur and will be difficult to fully identify. The bottom right one (Yankees) could be worth some bucks if it's real.

[Butch7999]

The Cubs item at top left suggests a 1907-08 issue, Kid Durbin's only two years with the team.
"Alex" next to it -- Alexandria ("Alex") Bay, New York?