I remember as a kid my grandfather kept a flat board maybe 12 inches long with all the saw blades that got dull....and the sharpening shop was a busy place...all the framers, carpenters, and wood guys knew where he was.
My grandfather always received the Belsaw Bulletins....and wanted to buy the set up to have his own shop.....and not long ago, I saw a craigslist add for a complete set up, and I mean every tool Belsaw made, from an old guy's estate, and the asking price was $1000 for all, or make offer. The add was posted for a month or more....don't know if anyone bought the stuff or not.
Now, in my business....when we trash a 12 inch carbide blade, it is cheaper to replace then to find a shop that can braze on new teeth and then sharpen....what a disposable world we live in.
If I ever get time to get back into sawing a lot, I will buy a Cooks Sharpener for sure.