New Flashback Consoles have started to show up in random stores. I saw the Atari Flashback 5 in a Toys R Us earlier this week. I didn't pick one up yet, but this guy found all three.
Their official release date is October 1 and they will probably all retail for $40. If previous Black Fridays are any indication, they'll probably all be on sale for $20 at various stores. They're neat little systems and well worth picking up if the games they have interest you.