There having a laugh on the graupner site, thave you seen the prices they are charging!
Before you condemn their prices, you should try organizing shipping, customs and other bureaucracy (certificates, document of compliance, EU regulations, lab tests, ...), warehouse, staff and more yourself.
Also remember that Graupner is trying to not take away customers from the hobby shops they distribute products to. If they did better prices, none of the local hobby shops would even think about selling their stuff.