Looks like Costco are clearing out their Wii U consoles.
$349.97 for the 32GB console. Mario Kart 8 is preinstalled, and you get a download code for Super Smash Bros for Wii U. Pictured stock was at the Canberra store. From memory it was previously priced at around $419.
(By way of comparison, EB Games are advertising the same console with Splatoon in place of Smash Bros for $429.00, though instore only and not much stock remaining by the looks of it)
Edit: Not the cheapest the console has been, but new stock seems to be getting harder to come by.
For an unsupported console which has been superseded and will most likely not seen any more titles released seems pricey