In-Karte which is the newly reevampled Cech Rail card cost me CZK 300 for 3 years and it give about 25% off standard tickets.
If you are a real Czech rail whore like me, maybe get it.
Otherwise too much hassle.
CD does offer deals, must mostly ONLY in the Czech language.
"Special deal", I travel from Domazlice to Cadca or Breclav for CZK 320 on my way to Slovakia using the Kilometrika Banka.
But, I "get around".
Any eastern European train questions, glad to help.

NOTE: The deoposit on beer bottles in CR is CZK 3 and in SK, SKK 4.
Cans have no deposit but tend to be dearer.
And the new logo of Cesky Drahy Freight? Spatny!