E-techgalaxy via Amazon offers the Nabi BigTab HD20 19.5" 16GB Android Tablet in Black/Silver, model no. BGTAB-NV20A, for $188.96 with free shipping. That's $11 under our February mention and the lowest total price we could find by $11, outside of the mention below. Features include an Nvidia Tegra 4 1.6GHz quad-core processor, 19.5" 1600x900 touchscreen LCD, 2GB RAM, 16GB storage, 802.11n wireless, front camera, Bluetooth, and nabi OS 3.0 Blue Morpho (overlaid on Android 4.4 KitKat).

A close price: Gravity Buys via eBay has it for $190 with free shipping.