What Is The most valuable MARKLIN train set in O guage?

xkss3 asked:
For 11000 cashin one dayi was told later it was told later it was told later it was worth 15 grand in europei am wondering if that valuableor is still that valuableor.
For 11000 cashin one dayi was worth 15 grand in europei am wondering if that valuableor is still that valuableor is the [...]