Over the years, I have purchased probably 10,000 stitch markers for my knitting. And the ONLY ONES I can ever find are the crappy Susan Bates red and blue plastic ones that date from about 1973. These are the world's most terrible markers. And I always have plenty of them and curse whenever I'm forced to use them.
So I finally broke down and bought a couple of packages of nice flexible markers. Which make me very happy. And will probably immediately get lost. If I took the time to dig down in the couch and chairs here, I'd probably find 9,999 of the missing good markers.