A bag of cheap wristwatch spring bars in different sizes costs more than the exact pair I need, but less than three exact pairs.
Two bags of cheap wristwatch spring bars in different sizes costs more than the lifetime supply of spring bars I am likely to need, but I lost the first bag somehow.
@ardgedee This phenomenon underlies the vast quantities of fasteners, fittings, switches, connectors, and other doohickeys that occupy the many many bins in my workshed.
@MightyBigCar Now that I have arguably a place of my own, I've slowly been digging through the boxes of parts-of-things that've accumulated, and sorting them into smaller bins, permanently labeled and permanently located.
It's been a great success with everything I haven't needed since moving here. Everything I have needed has been repurchased, of course.