Unique antique wood train foundry sand molds - $300 (Prescott)

I have about 60pcs left.
I would like to sell all at the same time for $300 but would consider separating them into individual pieces.
Estimate $10 to $50 a piece depending on the size.
They are all a bit Dusty but in good condition.
Many have heavy wire backs for displaying on walls, garages or man caves.
More than half are marked with numbers and or manufactured names.
Examples are wsl company.
Um company DC company SL company Jack Martin Petersen, Columbia quarry, Carson Hill and more.
I'm not certain about what they're called, or its function but somebody out there might.
See pictures for the various sizes and shapes.
There is one rocker arm? That's 5 ft tall.
All the rest are 48 in and smaller.
I sold all 5 of the gears / sprockets but everything else is available.