I have been collecting for 15 years with pieces ranging from free to $400. My most expensive piece was the Intelight ESB signal head, in the back to the left of the 3M signal. The second most expensive was the Crouse Hinds Type M four way in the back at $300. This new one, a Crouse Hinds Type D four way was $380 but thats going to add up. It'll definitely become the most expensive signal I own after buying four sets of visors, new latch hardware, and having it professionally powdercoated
Wow Nick you are good at getting good traffic lights. My 2 3M 130's was $300 shipping was a lot and then my 3M 131 4 part with the arrow that goes from green to yellow was $350 + the LEDs.
I think streetlights are easier for me to acquire too.