I think we all have gone through this process in one way or another. We start collecting broadly then narrow our focus, over time even changing focus from one brand/type to another. I think it's a natural form of evolution, as we gain more knowledge we know more questions to ask, have a better understanding of what it is we want to accomplish or which machines we want in our collections.
Now here's a Singer you won't see every day. The girl who owns it stands firm that it's not a repaint. I've stopped arguing with her.

Maybe someone would want to focus on machines like this one, not your every day Singer?
Good luck on the fire engine red machine, very few of those that aren't repaints. I've seen only a handful in my 5 years of trolling all the sites.
Cari