I have often wondered about this question, is there a "standard" rule of thumb for the average depreciation rate of a recent locomotive? Of course the value of a used locomotive is what someone will pay for it, but do forum members have benchmarks they use on what is reasonable "most" of the time (there will always be special outliers which make their own rules). So when I am looking at a used loco, here is a set of guidelines I typically apply relative to the used price versus the original cost or the cost of a current new model:
1) If the unit is 1-2 years old and does not come with warranty and out of the box newness, my benchmark is to discount it 20-25% off the original or current new cost. If it is not 25% off that price, I will spend that difference to get the new one.
2) In the 3-5 year old range, the loco gradually declines to 50% of the new cost. My benchmark is a unit 5 years old is generally worth 50% of the original or current new unit. (This of course assumes all is well and it is cosmetically in good shape, and you can get an equivalent new unit.)
3) Once they go beyond 5 years and the 50% value, there seems to be a flat line where an operating loco declines at some rate to be worth maybe 33% of the new / original cost. Once again assuming good cosmetics and operation.
Are these reasonable? Thoughts on similar benchmarks?