Somewhere I have some RR & RR Association comics. Silver Age by memory of size & crappy, pulpy paper style, maybe early 70s on one or two(whiter[not age]). Mostly about safety, but "the great loco chase"(I have the little book from the big yellow box Lionel General gift sets too), C Jones, Operations: passenger/freight/MOW etc etc. When they surface again, Ill show them off.
Interesting Peter.
Overstreet was always "thee" guide for stable pricing based on the real market.
A little slow on trends, but that is the cost of accuracy across the board. If your not a trend follower who thinks his beat up goods are suddenly worth big $, but a real reader/ collector....well this is the one I used, esp. for golden age.
Like many train people, a serious reader/collector as a kid, as an adult, I turned the four matching Hologram Spidey books bought at a drug store on a whim, into a business "by accident" Right place, right time, into right orders every time for the glut. Dropped it all just before the crash I was making it, easily, but doing it as a business was killing the fun for me; despite access to books others only dream of . So I shelved that "hobby", and sold off a stores worth till something "sparks" again. Kept enough base to do a decent show table, or two sometime. But I can't lift a small box now, let alone a big one.
My love for comics isn't more powerful than for a locomotive Id use that Superman cover to wrap & protect my 2037 if it would save it from harm.
But allow me to foam a sec. Frank Miller is Batman... I mean back man!