Years ago, when our workplace was bought out and the assets plundered/stripped, I found a DEC KDJ11 CPU board (PDP-11/83) in the trash. Someone had already ripped out the processor hybrid, more than likely to reclaim the gold.
I was thinking about putting it in a shadowbox for display this week when I pondered, "wonder if I can find a CPU chip online for less than ridiculous money..." The boards themselves sell for thousands of dollars today, but the processor itself can be had for surprisingly little. I made a lowball offer on the cheapest one I could find and it was accepted.
So here is my frankenCPU board, all ready to put on display. I'll probably never own a working PDP-11 (unless you count the SIMH emulator and blinkenlight display), but this is close enough for me.