can i still upgrade from acrobat 8 pro to acrobat 10 (not 11)? what is the cost?
Upgrade from Acrobat 8 is not possible, upgrade is only applicable from Acrobat version 9 onwards. You need to purchase the full version of Acrobat.
Let me know if you have any further question
Not from Adobe, but you may try to find an upgrade from a 3rd-party reseller like Amazon.