Very Low. You cannot typically buy a working train engine. It is generally government property, and if available, only via auction when retired.
For the same "fun" without the $25M price tag, builders often choose Trixbrix or Lego for safe and realistic layouts, jokes a 2026 post. buy a real train
If you are looking into this for a commercial project, I can look for for commercial renovations. Very Low
Extremely High. A used, retired locomotive can cost approx ₹80-90 Lakhs, and a high-speed train in Europe can cost around €25 million. and if available