Sonos offers its early adopters a 30 percent trade-in offer on new speakers | Engadget
Trade In Your Old Sonos for 30 Percent Discount on New One | PCMag
Sonos Trade-Up: Get 30% off any Sonos Product
Vogel's SOUND 4201 - Speaker Wall Mount Bracket for Sonos One and ONE SL - Swivel 70 degrees, Tilt 30 degrees - Also fits Sonos PLAY:1 - Black : Amazon.co.uk: Beauty