German Rail Pass Autumn Special

10 % discount on all German Rail passes for 3 or 4 days of travel
Booking period: 01/10/2019 - 14/12/2019
Travel period: 01/10/2019 - 31/01/2020

Autumn Special, travel period from
01 October 2019 to 31 January 2020, valid for 3 days in 1 month 144,00 EUR

Autumn Special, travel period from
01 October 2019 to 31 January 2020, valid for 4 days in 1 month 153,00 EUR

他をどうするかにもよりますが、動き回るのなら、これは安いと言えるでしょう。