Jet.com offers a pair of Grace Digital Bluetooth Bookshelf Speakers in Black, model no. BTSP201, for $99.99 with free shipping. That's the lowest total price we could find by $19. They feature 3.5" cone woofers, 1" dome tweeters, and a 50Hz to 20 kHz frequency response.
Note: You can also receive additional discounts during checkout by waiving free returns or by choosing select payment options.