I love to bargain hunt too. My collection is not as large as yours but I am working on it. I have been itching to go hunting in the wild for the last two weeks.
You have a very nice collection. You are correct, and I agree with the hairline cracks problem on old Gillette razors.. I have a Big Fellow with a tiny crack. It drives me crazy, knowing it's there, because I haven't figured out how to fix it yet.
What! Only 12 injectors.