Kiautschau 10

250 $ this is normal price for coins???

Seems so, there's others out there for sale for even more than that.
but given the condition 250 sounds like a "normal" price.

Did not know that Germans were involved in chinese coinage. So unusual to see the word Deutsch & chinese alphabets on the same coin.

Germans were not involved in Chinese coinage. Kiautschau (nowadays Jiaozhou) was a leased concession to Germany, similar to Hong Kong to the British and Macau to the Portuguese.
https://en.wikipedia.org/wiki/Kiautschou_Bay_concession

The concession was short lived, 1898-1914, but an important piece of the inheritance is the Tsingtao beer brewery, which is thriving to this very day.
https://en.wikipedia.org/wiki/Tsingtao_Brewery

Germany entered the stage of colonization very late (in the 1880-ies), and lost all of its colonies during WWI (1916 at the latest). So German colonial coinage is old, historically interesting, rare, and highly sought after. This accounts for the relatively high prices.