This is a very interesting discussion about whether or not buying cones or spools being more economical. I have also been wondering the same thing. But wouldn't one save more when buying them on sale. I also would like to keep on hand spools for uses to wind bobbins with so that I would not have to unthread my machine every time I run out of bobbin thread. I think the next time Connecting Threads have their thread sale that I will stock up on thread cones and spools.