If it's $5 at Adafruit, then how come it doesn't show it? Most of the time a store will list something even if it's out of stock, but will just put a sticker on the entry that says "Out of stock".
I still bought a bundle, because I haven't found any other way to get this in the next few weeks, and the board plus a few basics will be a great <$10 white elephant gift (after I see if I want to keep it for myself).