Knowing the answer and feeling somewhat nostalgic about it makes me feel old!
And then remembering taking forever to save anything on a school computer, only for the floppy to read half the file and die when I got home. It's amazing - maybe it was the crappy quality of floppies I was using, or maybe I was using them for too long, but for me, regularly not being able to read data back off a floppy was a fact of life. Times have definitely changed for the better :)
Out of curiosity, I just googled for prices and it seems prices stayed about the same since I bought the last pack.
Not only reuse but be pleasantly surprised yet irritated at the same time because suddenly the disk was magically usable again!