My layout was dismantled over 7 years ago and all of this has been sitting in boxes. I'm selling what is left of my collection. Below is just an example of what I have left. A little Post War is left, mostly newer stuff. Some of it is hard to find and highly collectable. Quite a few are operating cars. If you are looking for something specific, ask. Most of my stuff, not all of it, is still new in the box. Shipping is not inlcuded.
ZW Transformer 275 Watts $ 250.00
3413 Mercury Capsule Car $150.00
6470 Exploding Boxcar $ 35.00
"O" gauge 031 Remote switch left & right (pair) $70.00
Trainmaster Command Set-Includes Cab-1 remote & Command Base $135.00
Boston & Maine GP9 Triple Lash Up Engines (2 Powered and 1 Dummy) Command Control $565.00
Santa Fe Aluminum 5 Car Passenger Set 19109-19113 $695.00
Like I said, this is only a small example of what I have. No guarantee I'll have what you want, but I can take a look for you.
I'll try to get a more detailed list posted. Reasonable offers and trades considered.