The page is different now and has its own estimation price finder.
Tries to find the best price based on the cards you want to buy on magickartenmarkt.de
usage:
mkmlogin.py [optional cardlistfile]
if you don't supply a file with english names
1 cardname
4 cardname
it will try to login and read your default wantlist and select all cards with amount >100 and subtract 100
up to 25 cards does work, after that O(n²) kills it