The first transistors I had were similar to GE 2N107. I now have two GE 2N107 and three Raytheon CK722 transistors in my collection. They come up on eBay occasionally. The blue CK722s are highly sought after.
I started with tube circuits. I built a Geiger counter using the Raytheon CK1026 Geiger-Muller tube, and a capacity operated relay using the Miller 695 coil. The CK1026 tubes are very hard to find. The 695 coils are near impossible. I've got several of each in my tube collection. Thank you eBay.
My first job out of college was with Raytheon, new CK series parts were still being released.
