Elfen said:

I use too sell bootable floppies from my Vintage Mac Site for the Big Apple Users Group. But I ran out of 800K Disks, and no longer can do this (or at least until I get more 800K Disks). I used to charge $3 per disk and $2.50 shipping and handling.

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I think you can still buy blank 800K disks on eBay. But I wonder how long this media lasts? Certainly a disk that was written 30 years ago may suffer "bit rot" today and have problems when you try to read it. But what about a 30 year old floppy that's freshly formatted and written in 2014? Will it last to 2044?

It's possible to use a 1.4 MB floppy as an 800K floppy, but my understanding is that it's not very reliable, because the resistivity (?) of the physical media is different, or something like that.