Woot! has the https://www.woot.com/offers/lg-sk9y-5-1-2-ch-soundbar-w-subwoofer-16 (SK9Y) refurbished for $250 with free shipping. Features 501-watt RMS total system power, 200-watt wireless active subwoofer, dual-band WiFi & Bluetooth 4.0, built-in Chromecast & compatibility with Google Assistant, HDMI with 4K passthrough.

Has good Amazon Reviews.

$250 Shop Now

Amazon has the ELAC Uni-fi UF5 Floorstanding Speaker (UF51-BK) for $352 with free shipping. List price: $580. It features a custom-designed concentric driver, frequency response-42Hz to 25,000Hz, 3-way design, 4ohm impedance.

Has excellent Amazon Reviews.

$352 Shop Now

eBay has the Klipsch RSB-14 Sound Bar With Wireless Subwoofer Bluetooth Surround for $279 with free shipping. Features 4K Ultra-HD Video pass-through, Integrated Dolby Audio, 8" wireless subwoofer.

$279 Shop Now

Amazon has the Amazon Echo Sub for $110 with free shipping. List price: $130. Features delivers down-firing, 100W deep bass sound through a 6" woofer. ust plug in, open the Alexa app, and wirelessly connect to your Echo device(s) to control music with your voice.

Has good Amazon Reviews.

$110 Shop Now

eBay has the Vizio SmartCast Crave Go Wireless Speaker (SP30) for $33 with free shipping. Features 75Hz to 20KHz frequency reponse, Bluetooth.

$33 Shop Now

Amazon has the Pioneer Andrew Jones-Designed Bookshelf Speaker Pair (SP-BS22-LR) for $114 with free shipping. List price: $179. Features 80W capacity, 4" woofers, 1" tweeters.

Has excellent Amazon Reviews.

$114 Shop Now