Comment by nhellman

Germany does share an electricity market with its neighbours, you can see the live import and export e.g. here: https://www.iea.org/data-and-statistics/data-tools/real-time....

Currently, Germany is averaging around 6.4 GW of imports and 3.2 GW of exports. During production spikes caused by e.g. wind or solar power, the price quickly drops in the whole region, sometimes into the negative in order to help stabilize the grid frequency.