I was able to pick up some Teff flour on discount at the store. The flour is still fresh, so I think the store just wanted to discontinue it. Which means I’ll have to find it elsewhere when I need to purchase some more.
According to the internet, Teff is a seed not a grain and if that leaves you scratching your head, read here: Difference between Seeds and Grains. That is not the only article, just Google it for more information, it is quite fascinating actually.