The German government made no counteroffer. Instead, they were simply attempting to ensure that American President Donald Trump would not monopolize the coronavirus vaccine to use only for the lives of American citizens. Moreover, the German company in question— CureVac— has made no report of the German government making any sort of counteroffer. They have come forward to explain that they stand with the intentions of their nation's government in an effort to “help and protect patients worldwide.”
Even if there was evidence citing that the German government was to have made a counteroffer, their intentions are far too different than those expressed by American President Trump. While Trump was motivated by a belief of American superiority and profit, Germany would have been motivated by an “[interest] in ensuring that vaccines and active substances against the new coronavirus are also developed in Germany and Europe... no country should have exclusive access."
All of which is in line with their own values regarding a right to healthcare.