Another Roomba 780 Deal 12/16/2014 - EXPIRED

OK, so this was a deal of the day on Amazon at $420 the other day, and I posted about it.  It's last year's top of the line model, and I thought $420 was a great deal.  Right now, if you go to the iRobot store and order directly, they're selling the same model for $399 with free shipping if you follow the URL below:

http://slickdeals.net/f/7516512-irobot-roomba-780-vacuum-cleaning-robot-for-pets-and-allergies-399-99-free-shipping

You have to follow the link and add it to the cart to see the deal, and I think it's today only.  It's enough to make me consider ordering a replacement for our existing Roomba.