B&H Photo Video offers the Sonos Play:1 Wireless Speaker in Black or White for $149 with free shipping. That's $21 under our mention from February and the lowest total price we've seen. (It's also the best deal we could find now by $50, outside the below offer.) This humidity-resistant speaker features a frequency response of 100Hz to 20kHz, Ethernet port, WiFi, streaming via the Sonos app for iOS or Android, wall mount compatibility, and can be linked with other Sonos speakers to provide stereo sound or music streaming to multiple rooms. Update: Note that this item is currently on backorder, but can still be ordered at this price for delivery when available.
Need more than one? Best Buy offers a pair in black for $299.98 with free shipping.