Approx cost of train from Budapest to Krakow?

I want to take an overnight train (2nd class couchette or sleeper style) from Budapest to Krakow, and have found it here:
http://reiseauskunft.bahn.de/bin/query.exe/en?revia=yes&existOptimizePrice=1&et_cid=979&et_lid=493272&et_sub=Suchanfrage&trip-type=single&REQ0JourneyStopsS0A=1&S=BUDAPEST&REQ0JourneyStopsSID=A%3D1%40O%3DBUDAPEST%40X%3D19054084%40Y%3D47519550%40U%3D80%40L%3D005596001%40B%3D1%40p%3D1239733768%40&REQ0JourneyStopsZ0A=1&Z=KRAKOW&REQ0JourneyStopsZID=A%3D1%40O%3DKRAKOW%40X%3D19940546%40Y%3D50069934%40U%3D80%40L%3D005196001%40B%3D1%40p%3D1239733768%40&date=Mo%2C+11.05.09&time=1900&timesel=depart&returnTimesel=depart&optimize=1&travelProfile=-1&adult-number=1&children-number=0&infant-number=0&tariffTravellerType.1=E&tariffTravellerReductionClass.1=0&tariffTravellerAge.1=&qf-trav-bday-1=&tariffClass=2&start=1&qf.bahn.button.suchen=

But I wanted to figure out the approximate price that this would cost and it says "fares not available."

Anyone have any idea about approximately how much this might cost?

If you click the link to "Fares not available" you'll see that it's because you can't book them via the Internet. But they provide a phone number where you can ascertain those details.

By the way, to post a URL, click the button above the field where you write your message called "Url" and then paste the URL into the field which appears. Then type a description and finally click the same button again. So this is what it will look like: Budapest to Krakow
It takes you to the same site, but looks a bit tidier on the forum.

RailEurope has a fare calculator that seems to give price quotes for all journeys within Europe.

Do not book with them; use them to get an idea of price levels. I tried a number of itineraries just to make sure, and they seem to be some 30% too expensive for all journeys of which I could also get price quotes that I knew to be reliable.

www.jizdenka.cz has the answer.

You have to use some tricks to show you the correct fare via Bratislava. Kuty(Gr), Zebrzydowice(Gr) and Katowice. I already did the process for you and arrived at a fare of approx. 62 EUR plus reservation for the sleeper.

Hope this helps.