I would advise to rather get your fish for the place that how advise, reason being?
1) At least you can see the fish before to you buy it most importantly,
2)Import licence and permits for the fish.(Im not sure on how the importing works in Germany)
3) You are running the risk if the risk arriving alive and die or are carrying any diseases.
4)Fish arrive dead.
5) Commutation as you are dealing with people from Africa and they can be abit shadey, and i have friends in the importing of fish industry and they what they tell you are getting is sometimes not,wrong size,wrong type,condition etc.
I have personally tried to import poly's and have decide that it is too much risk on me even though i am in Africa!

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My advise will be get the fish from supplier that have went through all the trouble to get the fish.
It mite be a bit expensive but it will be worth every cent having a healthy fish.