Walmart offers the Vizio 25" 2.0 Wireless Sound Stand, model no. SS2520-C6, for $79 with free shipping. Outside of the mention below, that's the lowest total price we could find by $3, although we saw it bundled with a $25 gift card for $9 less last May. Features include Bluetooth, Dolby Digital decoding, DTS TruVolume, DTS StudioSound, and DTS TruSurround post-processing effects.
A close price: Newegg offers it for the in-cart price of $79.99 with free shipping.