3 years ago I traveled from Bratislava to Dresden. Can't remember what I paid ... maybe you can remind me.
Well, full tariff was actually rather expensive even then - it should have been app. 70+ EUR, but there were chance to travel cheaper with either breaking your ticket via Czech-German border or buying discounted Europa Spezial Bratislava-Dresden from DB website (from 39 EUR). Cheap Czech Brno-Dresden SporoTickets weren't available yet.
...noticed that the Sachsen ticket included Bohemia, i.e. the Czech Republic. So for 20 odd euros it was possible for 2 of us (and possibly up to 5) to travel from the Bavarian border to within a short distance of Bratislava.
Yepp, the thing is called Sachsen-Böhmen-Ticket, it combines Sachen ticket + pass for neighboring Czech regions. More info here -
http://www.bahn.de/regional/view/mdb/pv/dbregio/ausfluege/sachsen/MDB86333-sachsen_boehmen_ticket_2011.pdf (on page 4 you can actually see the map of all the Czech destination it is valid till)
Does such a trick work in the opposite direction? I just have to know how much money I wasted 3 years ago!!!
As of today there are couple way to travel Bratislava-Dresden, first of all already mention discounted SporoTicket from Brno to Dresden (from 29 EUR), Bratislava-Brno is rather cheap. Then there is also weekend option - SONE+DB pass, it is valid for the whole Czech network and till neighboring regions of Germany (including Dresden), it costs 650 CZK (up to 5 passengers). On other days there is ČD Net+DB pass, cost from 250 to 300 CZK and is valid for one of the bordering Czech regions (Plzeňský, Karlovarský, Liberecký etc.) and German border region. Plus there is still a good chance to catch 39 EUR Europa Spezial ticket Bratislava-Dresden bought online from DB website.