So, the S9 running on SHA-256 is pretty much bricked. Unless you have free electric, you’re probably not going to break-even trying to mine with them.
My question is, has anyone flashed new firmware (Nice Hash, etc) to an S9, put it back in service, and found it to be worth running?
You can find them in various conditions, all over the place. And, some are fairly reasonably priced. There are also a lot out there that are being sold for the price of a new one. I find that hilarious, as it’s basically a paperweight.